This document defines various types of anti-infective agents and provides examples of each. It discusses antibiotics such as penicillins, cephalosporins, macrolides, quinolones, tetracyclines, and aminoglycosides. It also covers antiviral drugs, antifungal agents, antiparasitic drugs, and anti-tuberculosis agents. For each class, it provides the definition, examples of drugs, and their mechanisms and uses.
1. Benzyl benzoate, lindane, permethrin, and crotamiton are antiscabious and antipedicular agents used to treat mites, lice, and crabs.
2. Ideal treatments must kill the adult parasites and destroy their eggs. Benzyl benzoate provides immediate relief from itching when applied topically and a single application of 25% emulsion achieves a complete cure.
3. Lindane is a mixture of hexachlorocyclohexane isomers with the gamma isomer responsible for activity. It is employed locally as a cream, lotion, or shampoo for scabies and pediculosis through direct contact
Methods for standardization of antibiotics NISHA MANDLOI
This document discusses methods for standardizing antibiotics. It notes that there are three important points for standardization: following FDA regulations, referring to FDA methods for individual antibiotics, and measuring inhibition of microbial growth. Two common assay methods are described: the cylinder-plate method which measures zones of inhibition, and the turbidimetric method which measures prevention of microbial growth. Procedures for preparing media, buffers, standards and samples are outlined. Streptomycin is used as an example antibiotic, noting it is bactericidal, derived from Streptomyces griseus, and tested using Bacillus subtilis.
Amphotericin B is a polyene antifungal drug produced by Streptomyces nodosus that is used intravenously to treat serious systemic fungal infections. It works by binding to ergosterol in the fungal cell membrane, disrupting the membrane and causing leakage of cell contents. While fungi contain ergosterol in their cell membranes, human cells contain cholesterol and are less affected. Common side effects include nephrotoxicity.
This document discusses suspensions, which are two-phase systems consisting of finely divided solid particles dispersed in a liquid vehicle. Suspensions can be classified based on administration route or particle size. They are useful for drugs with low solubility and can improve stability, release properties, and bioavailability compared to other dosage forms. However, suspensions are also prone to physical instability issues like sedimentation. The document outlines factors that affect sedimentation and strategies to improve suspension stability such as controlling particle size, viscosity, surface charge, and use of surfactants or flocculating agents. Wetting agents are also discussed which help disperse solid particles in the liquid vehicle by reducing surface tension.
This document provides information about pharmaceutical suspensions. It begins by defining a suspension as a disperse system where an insoluble solid internal phase is uniformly dispersed throughout an external liquid phase. Particle size is important for suspensions to be classified as coarse or colloidal. Suspensions differ from solutions in that particles remain dispersed rather than dissolving. Sedimentation occurs over time due to particle size and density. Suspending agents are added to prevent sedimentation by increasing viscosity. The document discusses formulation, applications, advantages, and disadvantages of suspensions.
This document provides an overview of pharmacognosy, including its definition, historical development, and modern applications. It discusses how pharmacognosy is the study of crude drugs from natural sources like plants, animals, and minerals. Over time, the field has advanced from early empirical use of natural remedies to the systematic isolation and characterization of active pharmaceutical ingredients using analytical techniques. Pharmacognosy continues to contribute to drug discovery and development through the study of natural products.
The document discusses amino acid pathways. It begins by defining amino acids as organic compounds containing amine and carboxyl groups. Amino acids can be classified as nonpolar/hydrophobic, polar/hydrophilic, or sulfur-containing. Humans can synthesize some amino acids but must obtain essential amino acids from food. Amino acid synthesis pathways derive amino acids from intermediates in glycolysis, the citric acid cycle, or pentose phosphate pathway, with nitrogen entering via glutamate and glutamine.
1. Benzyl benzoate, lindane, permethrin, and crotamiton are antiscabious and antipedicular agents used to treat mites, lice, and crabs.
2. Ideal treatments must kill the adult parasites and destroy their eggs. Benzyl benzoate provides immediate relief from itching when applied topically and a single application of 25% emulsion achieves a complete cure.
3. Lindane is a mixture of hexachlorocyclohexane isomers with the gamma isomer responsible for activity. It is employed locally as a cream, lotion, or shampoo for scabies and pediculosis through direct contact
Methods for standardization of antibiotics NISHA MANDLOI
This document discusses methods for standardizing antibiotics. It notes that there are three important points for standardization: following FDA regulations, referring to FDA methods for individual antibiotics, and measuring inhibition of microbial growth. Two common assay methods are described: the cylinder-plate method which measures zones of inhibition, and the turbidimetric method which measures prevention of microbial growth. Procedures for preparing media, buffers, standards and samples are outlined. Streptomycin is used as an example antibiotic, noting it is bactericidal, derived from Streptomyces griseus, and tested using Bacillus subtilis.
Amphotericin B is a polyene antifungal drug produced by Streptomyces nodosus that is used intravenously to treat serious systemic fungal infections. It works by binding to ergosterol in the fungal cell membrane, disrupting the membrane and causing leakage of cell contents. While fungi contain ergosterol in their cell membranes, human cells contain cholesterol and are less affected. Common side effects include nephrotoxicity.
This document discusses suspensions, which are two-phase systems consisting of finely divided solid particles dispersed in a liquid vehicle. Suspensions can be classified based on administration route or particle size. They are useful for drugs with low solubility and can improve stability, release properties, and bioavailability compared to other dosage forms. However, suspensions are also prone to physical instability issues like sedimentation. The document outlines factors that affect sedimentation and strategies to improve suspension stability such as controlling particle size, viscosity, surface charge, and use of surfactants or flocculating agents. Wetting agents are also discussed which help disperse solid particles in the liquid vehicle by reducing surface tension.
This document provides information about pharmaceutical suspensions. It begins by defining a suspension as a disperse system where an insoluble solid internal phase is uniformly dispersed throughout an external liquid phase. Particle size is important for suspensions to be classified as coarse or colloidal. Suspensions differ from solutions in that particles remain dispersed rather than dissolving. Sedimentation occurs over time due to particle size and density. Suspending agents are added to prevent sedimentation by increasing viscosity. The document discusses formulation, applications, advantages, and disadvantages of suspensions.
This document provides an overview of pharmacognosy, including its definition, historical development, and modern applications. It discusses how pharmacognosy is the study of crude drugs from natural sources like plants, animals, and minerals. Over time, the field has advanced from early empirical use of natural remedies to the systematic isolation and characterization of active pharmaceutical ingredients using analytical techniques. Pharmacognosy continues to contribute to drug discovery and development through the study of natural products.
The document discusses amino acid pathways. It begins by defining amino acids as organic compounds containing amine and carboxyl groups. Amino acids can be classified as nonpolar/hydrophobic, polar/hydrophilic, or sulfur-containing. Humans can synthesize some amino acids but must obtain essential amino acids from food. Amino acid synthesis pathways derive amino acids from intermediates in glycolysis, the citric acid cycle, or pentose phosphate pathway, with nitrogen entering via glutamate and glutamine.
CEPHALOSPORINS (First Genertaion)
Introduction:
First discovered in 1945
A class of Beta Lactam Antibiotics
Are derivatives of 7-aminocephalosporanic acid
They were first isolated from Cephalosporium acremonium (fungus)
Structure:
Are Beta-lactam compounds
In which the beta-lactam ring is fused to a 6-membered dihydrothiazine ring, thus forming the cephem nucleus.
Mechanism of action:
They are Bactericidal agents by cell lysis.
Bind to the Penicillin-binding proteins (PBPs) on the bacterial cell membrane and inhibit cell wall synthesis.
Inhibit Peptidoglycan synthesis by inhibiting the transpeptidation reaction – failure of cross-linking of peptidoglycan.
Mechanism of resistance
Acquired resitance to cephalosporins could be due to:
Alternation of the PBPs (target protiens)
Impermeability to the antibiotic thus preventing it to reach it’s site of action.
Production of Beta lactamases by many bacteria that inactivate the drug.
Resistance developed by penicilinase produced by staphylococci (less than penicillin)
Classification of cephalosporins:
Based on their spectrum of activity, Cephalosporins can be broadly categorized into four generations.
1st Generation (Cefazolin, Cephalexin)
2nd Generation (Cefotetan, Cefoxitin)
3rd Generation (Cefoperazone, Cefixime)
4th Genertaion (Cefepime)
First Generation drugs:
Also called Narrow spectrum Cephalosporins
Include;
ORAL:
CEPHALEXIN
CEFADROXIL
CEPHRADINE
PARENTERAL:
CEFAZOLIN (prototype)
CEPHAPIRIN
Anti-baterial spectrum:
First generation cephalosporins are very active against gram positive cocci which include:
Pneumococci
Streptococci
staphylococci.
Against gram negative bacilli
E. coli
Klebsiella
Proteus
Active against most penicillin-susceptible anaerobes found in the oral cavity,
except those belonging to the Bacteroides fragilis (that are Gram-negative bacillus bacterium species, and an obligate anaerobe of the gut ) group.
Clinical uses:
For dental surgical prophylaxis (Cephalexin and Cefazolin)
Skin and bone infections (Cefazolin)
Pharyngitis
Tonsilitis
Otitis
Pneumonia
UTI
Skin infections
Toxicity:
Diarrhea
Nausea
Vomiting
Abdominal discomfort
Headache
Fever
Rashes
Pruritis
Urticaria
Serum sickness like reaction
Disturbance in liver enzymes
Transient Hepatitis
Cholestatic jaundice
Eosinaphilia
Blood disorders
Antibiotic associated colitis (rare)
Individuals can vary significantly in their response to drugs due to differences in pharmacokinetic and pharmacodynamic factors. Variations exist between patients and also within the same patient over time. Several categories influence drug action, including individual differences in absorption, distribution, metabolism and excretion of drugs; variations in receptor numbers and proteins; and differences in physiological and pathological states. Factors such as age, sex, genetics, concurrent diseases or medications, and route of administration can impact drug action either quantitatively by altering concentrations or qualitatively by changing the type of response. Environmental conditions and psychological aspects also modify a drug's effects.
Chlorobutanol is a colorless to white crystalline compound with a camphoraceous odor and taste. It is widely used as a preservative in pharmaceutical solutions, especially injectables, and is an active ingredient in certain oral sedatives and topical anesthetics. Chlorobutanol is prepared by reacting chloroform and acetone in the presence of a strong base such as potassium hydroxide. It is used as a preservative in pharmaceutical preparations to protect them from chemical change or microbial action.
Tinctures are liquid extracts made using alcohol or glycerin to dissolve active compounds from plants or chemicals. Alcohol is the most common solvent as it can extract many compounds and acts as a preservative. Tinctures contain 1 part drug to 5 parts solvent and the alcohol content typically ranges from 25-60%. Common tinctures include orange, benzoin, and opium which are used for their flavoring, stimulant, and analgesic properties respectively. Tinctures are classified based on solvent, presence of active compounds, and method of administration such as oral or topical. They are prepared through maceration, percolation, or simple solution and must be properly stored, labeled, and dosed.
The document describes the percolation process, which is a method of extracting active constituents from drugs using a solvent. It involves comminuting the drug into a fine powder, imbibing it with solvent, packing it into a percolator, macerating it for 24 hours, then slowly percolating more solvent through it while collecting the extract. The key steps are size reduction of the drug, moistening it with solvent, packing it uniformly in a conical percolator, macerating it overnight, then slowly draining more solvent through it over multiple days to extract the active compounds.
Drug metabolism involves two main phases: Phase I involves reactions like oxidation, reduction and hydrolysis that make the drug more polar. This is mainly done by cytochrome P450 enzymes in the liver. Phase II involves conjugating reactions like glucuronidation, sulfation and acetylation to make the drug more water soluble for excretion. Cytochrome P450 isoenzymes like CYP3A4 metabolize many drugs. Understanding drug metabolism is important in drug discovery and development.
Pharmaceutical degradation can occur through physical, chemical, or microbiological processes. Physical degradation includes changes in appearance, properties like hardness or consistency, and polymorphic changes. Chemical degradation involves reactions like hydrolysis, oxidation, decarboxylation, isomerization, and polymerization that break down the drug. Microbial degradation is caused by microbial growth contaminating the product. Proper storage conditions and formulation design can help prevent degradation through control of factors like temperature, humidity, light exposure, and microbial contamination.
1. Amebiasis is an intestinal infection caused by the parasite Entamoeba histolytica, which can range from asymptomatic to severe dysentery. It is diagnosed by identifying the parasite in fresh stool samples.
2. Metronidazole is the drug of choice for treating amebiasis. It is activated by anaerobic organisms to damage parasite DNA.
3. Drugs for amebiasis are classified as luminal, systemic, or mixed based on where they act. Metronidazole is a mixed amebicide that treats both intestinal and extraintestinal infections.
The document discusses how urine pH affects the tubular reabsorption and renal excretion of weak acids and bases. It states that acidification of urine promotes reabsorption of weak acids and retards reabsorption of weak bases, while alkalization of urine has the opposite effects. The extent of ionization of drugs depends on the drug's pKa value and urine pH. It also discusses how urine flow rate and drug clearance influence renal drug excretion. Clearance is defined as the volume of fluid cleared of drug per unit of time and can be used to determine the mechanism of renal drug excretion.
This document discusses variations in tinctures and extracts. It describes tinctures as alcoholic or hydroalcoholic solutions prepared from vegetable materials or chemical substances, with alcohol content ranging from 15-80%. It discusses different methods of preparation for tinctures and variations in strength. It also covers flavored non-medicated tinctures, topical vs oral tinctures, and factors like aging. Finally, it briefly introduces extracts and fluid extracts.
This document discusses antidiarrheal drugs and their mechanisms of action. It begins by defining diarrhea and describing the relevant pathophysiology of electrolyte and water absorption and secretion in the intestines. It then covers therapeutic measures for diarrhea including rehydration, nutrition, antimicrobial drugs for specific infections, probiotics, drugs for inflammatory bowel disease like 5-aminosalicylic acid compounds, corticosteroids, immunosuppressants, and TNF inhibitors. Finally, it discusses nonspecific antidiarrheal drugs that work by absorption, decreasing secretion, or decreasing motility, such as loperamide, diphenoxylate, and codeine.
Expt. 10 effect of spasmogens and spasmolytics using rabbit jejunumVISHALJADHAV100
Overview of Discussion
Objective
Principle
Requirements
Experimental specifications (conditions)
Drugs and solutions used in rabbit intestine experiment
Preparation of Tyrode solution (PSS)
Procedure
Kymograph recording of contractions
Observation table
Result and interpretation
1) Peptic ulcers are caused by an imbalance between aggressive factors like gastric acid and protective factors in the stomach and duodenum.
2) Anti-ulcer drugs work by decreasing gastric acid secretion, enhancing mucosal protection, or eradicating the H. pylori bacteria responsible for many ulcers.
3) Common classes of anti-ulcer medications include H2 receptor antagonists, proton pump inhibitors, antacids, and anti-H. pylori drugs. H2 receptor antagonists and proton pump inhibitors reduce acid by blocking histamine and the proton pump, while antacids neutralize existing acid.
Pharmaceutical syrups are concentrated aqueous preparations containing 85% sugar or sugar substitute, with or without flavorings and active medicinal substances. They provide an easy to administer oral liquid dosage form. Syrups are prepared through various methods including solution with heat, agitation without heat, addition of sucrose to liquid medicaments, or percolation. They contain components like sweeteners, preservatives, viscosity modifiers, flavorings, and colorants. Syrups offer advantages like suitability for all ages and easy administration but have disadvantages like delayed onset of action and unsuitability for some patients. Proper packaging is also required to ensure the quality and safety of syrup products.
Bronchial asthma is a chronic respiratory condition characterized by hyperresponsiveness of the airways and inflammation. It results in narrowing of the air tubes accompanied by increased secretions, mucosal edema, and mucus plugging, primarily due to inflammation. The main treatments for bronchial asthma include bronchodilators, mast cell stabilizers, leukotriene antagonists, and corticosteroids. Bronchodilators such as beta-2 agonists and methylxanthines work to relax airway smooth muscle and widen the airways, while mast cell stabilizers and leukotriene antagonists work to reduce inflammation and prevent narrowing.
This document provides an overview of different classes of antibiotics, including their mechanisms of action, uses, and side effects. It discusses beta-lactam antibiotics like penicillins and cephalosporins, as well as macrolides, fluoroquinolones, aminoglycosides, tetracyclines, chloramphenicol, glycopeptides and others. Each class is described in terms of its antimicrobial spectrum and applications for treating various bacterial infections. Potential adverse effects are also outlined for safety considerations.
CEPHALOSPORINS (First Genertaion)
Introduction:
First discovered in 1945
A class of Beta Lactam Antibiotics
Are derivatives of 7-aminocephalosporanic acid
They were first isolated from Cephalosporium acremonium (fungus)
Structure:
Are Beta-lactam compounds
In which the beta-lactam ring is fused to a 6-membered dihydrothiazine ring, thus forming the cephem nucleus.
Mechanism of action:
They are Bactericidal agents by cell lysis.
Bind to the Penicillin-binding proteins (PBPs) on the bacterial cell membrane and inhibit cell wall synthesis.
Inhibit Peptidoglycan synthesis by inhibiting the transpeptidation reaction – failure of cross-linking of peptidoglycan.
Mechanism of resistance
Acquired resitance to cephalosporins could be due to:
Alternation of the PBPs (target protiens)
Impermeability to the antibiotic thus preventing it to reach it’s site of action.
Production of Beta lactamases by many bacteria that inactivate the drug.
Resistance developed by penicilinase produced by staphylococci (less than penicillin)
Classification of cephalosporins:
Based on their spectrum of activity, Cephalosporins can be broadly categorized into four generations.
1st Generation (Cefazolin, Cephalexin)
2nd Generation (Cefotetan, Cefoxitin)
3rd Generation (Cefoperazone, Cefixime)
4th Genertaion (Cefepime)
First Generation drugs:
Also called Narrow spectrum Cephalosporins
Include;
ORAL:
CEPHALEXIN
CEFADROXIL
CEPHRADINE
PARENTERAL:
CEFAZOLIN (prototype)
CEPHAPIRIN
Anti-baterial spectrum:
First generation cephalosporins are very active against gram positive cocci which include:
Pneumococci
Streptococci
staphylococci.
Against gram negative bacilli
E. coli
Klebsiella
Proteus
Active against most penicillin-susceptible anaerobes found in the oral cavity,
except those belonging to the Bacteroides fragilis (that are Gram-negative bacillus bacterium species, and an obligate anaerobe of the gut ) group.
Clinical uses:
For dental surgical prophylaxis (Cephalexin and Cefazolin)
Skin and bone infections (Cefazolin)
Pharyngitis
Tonsilitis
Otitis
Pneumonia
UTI
Skin infections
Toxicity:
Diarrhea
Nausea
Vomiting
Abdominal discomfort
Headache
Fever
Rashes
Pruritis
Urticaria
Serum sickness like reaction
Disturbance in liver enzymes
Transient Hepatitis
Cholestatic jaundice
Eosinaphilia
Blood disorders
Antibiotic associated colitis (rare)
Individuals can vary significantly in their response to drugs due to differences in pharmacokinetic and pharmacodynamic factors. Variations exist between patients and also within the same patient over time. Several categories influence drug action, including individual differences in absorption, distribution, metabolism and excretion of drugs; variations in receptor numbers and proteins; and differences in physiological and pathological states. Factors such as age, sex, genetics, concurrent diseases or medications, and route of administration can impact drug action either quantitatively by altering concentrations or qualitatively by changing the type of response. Environmental conditions and psychological aspects also modify a drug's effects.
Chlorobutanol is a colorless to white crystalline compound with a camphoraceous odor and taste. It is widely used as a preservative in pharmaceutical solutions, especially injectables, and is an active ingredient in certain oral sedatives and topical anesthetics. Chlorobutanol is prepared by reacting chloroform and acetone in the presence of a strong base such as potassium hydroxide. It is used as a preservative in pharmaceutical preparations to protect them from chemical change or microbial action.
Tinctures are liquid extracts made using alcohol or glycerin to dissolve active compounds from plants or chemicals. Alcohol is the most common solvent as it can extract many compounds and acts as a preservative. Tinctures contain 1 part drug to 5 parts solvent and the alcohol content typically ranges from 25-60%. Common tinctures include orange, benzoin, and opium which are used for their flavoring, stimulant, and analgesic properties respectively. Tinctures are classified based on solvent, presence of active compounds, and method of administration such as oral or topical. They are prepared through maceration, percolation, or simple solution and must be properly stored, labeled, and dosed.
The document describes the percolation process, which is a method of extracting active constituents from drugs using a solvent. It involves comminuting the drug into a fine powder, imbibing it with solvent, packing it into a percolator, macerating it for 24 hours, then slowly percolating more solvent through it while collecting the extract. The key steps are size reduction of the drug, moistening it with solvent, packing it uniformly in a conical percolator, macerating it overnight, then slowly draining more solvent through it over multiple days to extract the active compounds.
Drug metabolism involves two main phases: Phase I involves reactions like oxidation, reduction and hydrolysis that make the drug more polar. This is mainly done by cytochrome P450 enzymes in the liver. Phase II involves conjugating reactions like glucuronidation, sulfation and acetylation to make the drug more water soluble for excretion. Cytochrome P450 isoenzymes like CYP3A4 metabolize many drugs. Understanding drug metabolism is important in drug discovery and development.
Pharmaceutical degradation can occur through physical, chemical, or microbiological processes. Physical degradation includes changes in appearance, properties like hardness or consistency, and polymorphic changes. Chemical degradation involves reactions like hydrolysis, oxidation, decarboxylation, isomerization, and polymerization that break down the drug. Microbial degradation is caused by microbial growth contaminating the product. Proper storage conditions and formulation design can help prevent degradation through control of factors like temperature, humidity, light exposure, and microbial contamination.
1. Amebiasis is an intestinal infection caused by the parasite Entamoeba histolytica, which can range from asymptomatic to severe dysentery. It is diagnosed by identifying the parasite in fresh stool samples.
2. Metronidazole is the drug of choice for treating amebiasis. It is activated by anaerobic organisms to damage parasite DNA.
3. Drugs for amebiasis are classified as luminal, systemic, or mixed based on where they act. Metronidazole is a mixed amebicide that treats both intestinal and extraintestinal infections.
The document discusses how urine pH affects the tubular reabsorption and renal excretion of weak acids and bases. It states that acidification of urine promotes reabsorption of weak acids and retards reabsorption of weak bases, while alkalization of urine has the opposite effects. The extent of ionization of drugs depends on the drug's pKa value and urine pH. It also discusses how urine flow rate and drug clearance influence renal drug excretion. Clearance is defined as the volume of fluid cleared of drug per unit of time and can be used to determine the mechanism of renal drug excretion.
This document discusses variations in tinctures and extracts. It describes tinctures as alcoholic or hydroalcoholic solutions prepared from vegetable materials or chemical substances, with alcohol content ranging from 15-80%. It discusses different methods of preparation for tinctures and variations in strength. It also covers flavored non-medicated tinctures, topical vs oral tinctures, and factors like aging. Finally, it briefly introduces extracts and fluid extracts.
This document discusses antidiarrheal drugs and their mechanisms of action. It begins by defining diarrhea and describing the relevant pathophysiology of electrolyte and water absorption and secretion in the intestines. It then covers therapeutic measures for diarrhea including rehydration, nutrition, antimicrobial drugs for specific infections, probiotics, drugs for inflammatory bowel disease like 5-aminosalicylic acid compounds, corticosteroids, immunosuppressants, and TNF inhibitors. Finally, it discusses nonspecific antidiarrheal drugs that work by absorption, decreasing secretion, or decreasing motility, such as loperamide, diphenoxylate, and codeine.
Expt. 10 effect of spasmogens and spasmolytics using rabbit jejunumVISHALJADHAV100
Overview of Discussion
Objective
Principle
Requirements
Experimental specifications (conditions)
Drugs and solutions used in rabbit intestine experiment
Preparation of Tyrode solution (PSS)
Procedure
Kymograph recording of contractions
Observation table
Result and interpretation
1) Peptic ulcers are caused by an imbalance between aggressive factors like gastric acid and protective factors in the stomach and duodenum.
2) Anti-ulcer drugs work by decreasing gastric acid secretion, enhancing mucosal protection, or eradicating the H. pylori bacteria responsible for many ulcers.
3) Common classes of anti-ulcer medications include H2 receptor antagonists, proton pump inhibitors, antacids, and anti-H. pylori drugs. H2 receptor antagonists and proton pump inhibitors reduce acid by blocking histamine and the proton pump, while antacids neutralize existing acid.
Pharmaceutical syrups are concentrated aqueous preparations containing 85% sugar or sugar substitute, with or without flavorings and active medicinal substances. They provide an easy to administer oral liquid dosage form. Syrups are prepared through various methods including solution with heat, agitation without heat, addition of sucrose to liquid medicaments, or percolation. They contain components like sweeteners, preservatives, viscosity modifiers, flavorings, and colorants. Syrups offer advantages like suitability for all ages and easy administration but have disadvantages like delayed onset of action and unsuitability for some patients. Proper packaging is also required to ensure the quality and safety of syrup products.
Bronchial asthma is a chronic respiratory condition characterized by hyperresponsiveness of the airways and inflammation. It results in narrowing of the air tubes accompanied by increased secretions, mucosal edema, and mucus plugging, primarily due to inflammation. The main treatments for bronchial asthma include bronchodilators, mast cell stabilizers, leukotriene antagonists, and corticosteroids. Bronchodilators such as beta-2 agonists and methylxanthines work to relax airway smooth muscle and widen the airways, while mast cell stabilizers and leukotriene antagonists work to reduce inflammation and prevent narrowing.
This document provides an overview of different classes of antibiotics, including their mechanisms of action, uses, and side effects. It discusses beta-lactam antibiotics like penicillins and cephalosporins, as well as macrolides, fluoroquinolones, aminoglycosides, tetracyclines, chloramphenicol, glycopeptides and others. Each class is described in terms of its antimicrobial spectrum and applications for treating various bacterial infections. Potential adverse effects are also outlined for safety considerations.
This document discusses antibiotics, including their classification, mechanisms of action, uses, and side effects. It covers several classes of antibiotics such as penicillins, cephalosporins, and their generations. Antibiotics work by inhibiting bacterial cell wall synthesis, disrupting cellular membranes, or interfering with protein, nucleic acid, or folic acid synthesis. Their use requires consideration of the infecting organism, patient factors, and development of resistance. Combination antibiotic therapy can have additive, synergistic, or antagonistic effects.
This document provides an overview of antibiotics, including their classification, mechanisms of action, and common types. It discusses how antibiotics are classified based on their mechanism of action, spectrum of activity, and mode of action. The major classes covered include penicillins, cephalosporins, macrolides, aminoglycosides, fluoroquinolones, and tetracyclines. Specific antibiotics are given within each class with details on their indications, mechanisms, and side effects. Combination antibiotic therapy and developing antibiotic resistance are also summarized.
This document provides an overview of different classes of antibiotics, including their mechanisms of action, common uses, and side effects. It discusses penicillins, cephalosporins, carbapenems, monobactams, macrolides, ketolides, lincosamides, aminoglycosides, fluoroquinolones, and trimethoprim/sulfamethoxazole. It also covers topics like antibiotic resistance, combinations, ideal properties, and complications of antibiotic therapy.
This document provides an overview of antibiotics, including their classification, mechanisms of action, and common types. It discusses how antibiotics are classified based on their mechanism of action, spectrum of activity, and mode of action. The major classes covered include penicillins, cephalosporins, macrolides, aminoglycosides, fluoroquinolones, and tetracyclines. Specific antibiotics are given within each class with details on their indications, mechanisms, and side effects. Combination antibiotic therapy and developing antibiotic resistance are also summarized.
This document discusses antibacterial agents, specifically penicillins. It provides background on penicillins, noting they contain a beta-lactam ring that inhibits bacterial cell wall formation. Examples of penicillins are discussed, including benzylpenicillin, phenoxymethylpenicillin, ampicillin, and amoxicillin. Resistance via bacterial production of beta-lactamase is also mentioned.
This document provides an overview of chemotherapy and antimicrobial agents. It discusses the types of bacteria, classification of antimicrobials, mechanisms of action and resistance. Specific drug classes are covered in detail including penicillins, cephalosporins, tetracyclines, macrolides, aminoglycosides, and fluoroquinolones. Adverse effects and clinical uses are described for each class. The document aims to educate students on the general concepts of antimicrobial therapy and properties of commonly used antibiotic drugs.
This document provides an overview of chemotherapy and antimicrobial drugs. It begins by discussing the history and development of antimicrobial drugs from 1910 onward. It then defines key terms related to chemotherapy and antimicrobial classification. The document discusses various classes of antimicrobial drugs like penicillins, cephalosporins, and beta-lactam inhibitors in detail. It covers the mechanisms of action, spectra of activity, pharmacokinetics and clinical uses of these drug classes. Adverse effects and resistance to penicillins are also summarized. The document provides classifications of antimicrobials and concludes by noting that cefotaxime and ceftriaxone effectively cross the blood-brain barrier to treat meningitis.
ANTIBIOTICS IN ORAL & MAXILLOFACIAL SURGERYankitaraj63
This document provides an overview of antibiotics used in oral and maxillofacial surgery. It begins with an introduction to antibiotics and their history. It then discusses various ways antibiotics can be classified including by chemical structure, mechanism of action, and spectrum of activity. Key principles for choosing and administering antibiotics are outlined. Common adverse reactions and antibiotic resistance are also reviewed. The document concludes with references. It provides a comprehensive but concise review of important antibiotics and concepts related to their use in oral and maxillofacial surgery.
This document discusses various antibiotics used in ophthalmology. It defines antibiotics and describes their mechanisms of action. The document separates antibiotics into broad classifications like bacteriostatic, bactericidal, narrow/broad spectrum. It also separates antibiotics based on whether they are effective against gram-positive or gram-negative bacteria. Specific antibiotics are grouped and described, including penicillins, cephalosporins, aminoglycosides, tetracyclines, chloramphenicol, and fluoroquinolones. Common ophthalmic uses of antibiotics include treating bacterial conjunctivitis, use as pre-operative prophylaxis, and treating bacterial or fungal keratitis.
This document defines key terms related to antimicrobial drugs and provides guidance on their appropriate use. It discusses:
1. Common types of antimicrobial drugs including antibacterial, antiviral, antifungal, and antiparasitic.
2. Characteristics of broad and narrow spectrum antibacterials.
3. Mechanisms of action for killing or inhibiting bacterial growth.
4. Examples of common antibiotics and their indications.
5. Factors to consider when selecting an antibiotic for odontogenic infections.
The document discusses several key aspects of prokaryotic DNA and plasmids, antibiotic mechanisms and classes. It describes how prokaryotic DNA is organized into a circular chromosome that is folded and compacted. It also notes that plasmids are small DNA molecules that can be transferred between cells and code for traits like antibiotic resistance, virulence factors or conjugation. The document then outlines the main classes of antibiotics including penicillins, cephalosporins, fluoroquinolones, macrolides and others; and describes their mechanisms and common examples.
Antimicrobial drugs have evolved greatly since the discoveries of Salvarsan, sulfonamides, penicillin, and streptomycin. Many modern antibiotics are produced by soil bacteria like Streptomyces. Antibiotics can be bacteriostatic or bactericidal, and have narrow or broad spectra of activity. They work via several mechanisms including inhibiting cell wall, protein, DNA, and folate synthesis. Adverse effects include allergic reactions, toxicity, and disruption of normal flora. Selection of antimicrobial therapy requires confirming infection and identifying pathogens. Classes of antimicrobials also exist for viruses, fungi, protozoa, and helminths.
This document provides an overview of chemotherapy and antimicrobial agents. It begins with a brief history of chemotherapy from ancient times to the modern era. Key figures like Fleming, Florey, Chain and Waksman who discovered important antibiotics like penicillin and streptomycin are mentioned. Basic terminology used in chemotherapy is defined, including terms like antimicrobial, antibiotic, spectrum, bactericidal and bacteriostatic. The major classes of chemotherapeutic agents are listed. Gram-positive and gram-negative bacteria are distinguished and examples are given. Ideal properties of antiseptics and disinfectants are outlined. The document concludes with an assignment asking students to describe bacterial cell structure, distinguish between gram-positive and negative bacteria, and
Alexander Fleming accidentally discovered penicillin in 1928 when he observed bacteria-free zones around mold colonies growing in petri dishes. Penicillin was the first natural antibiotic compound and works by inhibiting bacterial cell wall synthesis. Since then, over 100 different antibiotics have been discovered that work through various mechanisms like inhibiting protein synthesis or nucleic acid replication. However, antibiotic resistance has become a major problem requiring prudent antibiotic use and new antibiotic development.
6.antibiotics in oral and maxillofacial surgeryTejaswini498924
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Unit 6 Anti-Infective agent.pdf
1. Unit 6 : Anti-Infective Agents
HCSP 1232 Intro to Pharma
Roszan Sapon
2. Objective
• Definition, class, mode of action and
example of drug ;
• Anti-infective
• Antibiotic
• Antiviral
• Antifungal
• Antiparasites
3. Some terminology
• Pathogen: Disease causing microorganism.
• Empiric: Therapy that is started based upon on
experience and precedent in the observation
and treatment of disease.
• Normal flora: Organisms found in various parts
of the body living symbiotically.
• Aerobic: Requires oxygen to survive.
• Anaerobic: Does not require oxygen to survive.
4. • Gram Stain: Laboratory test used to determine
if an organism is gram-positive or gram-
negative.
• C & S: Culture and sensitivity. Determines the
organism present in the culture and the
antibiotic to which it is sensitive (susceptible to).
• Fungicide / fungistatic: To kill fungus
• Mycosis: Disease cause by fungus
Some terminology - cont
5. Definition
• Anti-infective : An agent that is capable of
acting against infection, either by inhibiting the
spread of an infectious agent of by killing the
infectious agent outright.
• Antibiotic: Substance that kills microorganism
growth (mostly bacteria).
• Antiviral : Class of medication used for treating
viral infections
• Antifungal : Pharmaceutical fungicide used to
treat and prevent mycosis
• Antiparasites : Drugs used to treat parasitic
diseases.
7. 1. Antibiotic
• An antibiotic is a type of anti-infective substance
active against bacteria.
• It is the most important of antibacterial agent for
fighting infection.
• Widely used in treatment and prevention of such
infection.
• Bacteriostatic: Inhibits replication of
microorganisms and prevents growth. Does not
kill bacteria.
• Bacteriocidal: Kills the bacteria.
8. Antibiotic - Mode of action
• Mode of action :
• They may either kill or inhibit the growth of
bacteria.
• Bacteriostatic: Inhibits replication of
microorganisms and prevents growth. Does
not kill bacteria.
• Bacteriocidal: Kills the bacteria. Its may
attack he structures of the microb including
their nucleus.
11. Antibiotics - Penicillins
• In 1928, Alexander Fleming noted that mold
belonging to the genus Penicillium inhibited the
growth of bacteria. Fleming called this unknown
antibacterial substance penicillin. Ten years later, a
group at Oxford University began to investigate
penicillin in laboratory mice. Penicillin was hailed as
a miracle drug and saved countless lives in World
War II
• Penicillins are antibiotics used to treat bacterial
infections that are derived from the antibiotic
penicillin.
12. Uses for Penicillin
• Penicillin antibiotics are used to treat many
types of infections caused by susceptible
bacteria. They are used to treat infections of
the middle ear, sinuses, stomach and
intestines, bladder, and kidney. They also are
used for treating
• pneumonia,
• blood infections (sepsis),
• uncomplicated gonorrhea,
• meningitis,
• endocarditis, and
• other serious infections.
13. • Penicillin V
• Penicillin G (P
fi
zerpen, Permapen)
• Amoxicillin/clavulonate (Augmentin)
• Ampicillin (Unasyn)
• Nafcillin (Nallpen)
• Oxacillin (Bactocill)
• Dicloxacillin
• Cloxacillin
Example of penicillin antibiotics
14. Antibiotics - Cephalosporins
• Cephalosporins are a large group of antibiotics derived from
the mold Acremonium (previously called Cephalosporium).
• Cephalosporins are bactericidal (kill bacteria) and work in a
similar way to penicillins.
• They bind to and block the activity of enzymes responsible
for making peptidoglycan, an important component of the
bacterial cell wall.
• They are called broad-spectrum antibiotics because they
are effective against a wide range of bacteria.
15. Use for Cephalosporins
• Cephalosporins may be used to treat infections
caused by susceptible bacteria, such as:
• Bone infections
• Ear infections (eg, otitis media)
• Skin infections
• Upper respiratory tract infections
• Urinary tract infections.
Cephalosporins are not usually used as a
fi
rst-
choice antibiotic. They tend to be reserved for
use when other antibiotics (often penicillins)
cannot be used.
16. Example of Cephalosporins
• There are currently five “generations” of
cephalosporins, with each generation
differing slightly in their antibacterial
spectrum (ie, how effective they are at
killing certain types of bacteria).
• Within each generation, there are
differences in terms of administration
(such as oral or intravenous
administration), absorption, excretion,
and how long the activity of the
cephalosporin lasts for in the body.
17. Example of Cephalosporins - cont
• Ancef and Kefazol (cefazolin)
• Ceclor and Cefaclor (cefaclor)
• Cefdinir.
• Ceftin and Zinacef (cefuroxime)
• Duricef (cefadroxil)
• Keflex and Keftabs (cephalexin)
• Maxipime (cefepime)
• Rocephin (ceftriaxone)
18. Antibiotics - Macrolides
• Macrolide: One in a class of antibiotics that includes
Biaxin (Clarithromycin), Zithromax (Azithromycin),
Dificid (Fidoximycin), and Erythromycin.
• The macrolides inhibit the growth of bacteria and are
often prescribed to treat rather common bacterial
infections.
• In more technical terms, the macrolides are a group of
antibiotics produced by various strains of
Streptomyces (spore forming bacteria that grow slowly
in soil or water as a branching filamentous mycelium
similar to that of fungi) and have a complex chemical
(macrocyclic) structure. They act by inhibiting protein
synthesis, specifically by blocking the 50S ribosomal
subunit. They are broad spectrum antibiotics.
19. Antibiotics - Quinolones
• A quinolone antibiotic is a member of a large group
of broad-spectrum bacteriocidals that share a bicyclic
core structure related to the substance 4-quinolone.
• They are used in human and veterinary medicine to
treat bacterial infections, as well as in animal
husbandry.
• Nearly all quinolone antibiotics in use are
fluoroquinolones, which contain a fluorine atom in
their chemical structure and are effective against
both Gram-negative and Gram-positive bacteria.
• One example is ciprofloxacin, one of the most widely
used antibiotics worldwide.
20. Antibiotics - Tetracyclines
• Tetracyclines have a broad spectrum of activity
against many gram-positive and gram-negative
bacteria as well as Mycoplasma, Chlamydia,
Rickettsiae, Plasmodia, and amoebae.
• They are usually bacteriostatic.
• Tetracyclines bind reversibly to the small subunits of
bacterial (and eukaryotic) ribosomes where they
interfere with binding of charged-tRNA to the
"Acceptor" site.
• Tetracyclines can also inhibit protein synthesis in the
host, but are less likely to reach the concentration
required because eukaryotic cells do not have a
tetracycline uptake mechanism.
21. Use of Tetracyclines
• Tetracyclines are used widely in both human and veterinary
medicine; for example, tetracyclines have been used:
• For the prevention of malaria
• For the treatment of moderate-to-severe acne or rosacea
• To treat anthrax
• To treat infections of the eye, gastrointestinal tract,
genitourinary tract, gums, respiratory tract, and skin
• To treat infections caused by lice, mites, or ticks (such as
Rocky Mountain spotted fever, typhus fever)
• To treat infections caused by Campylobacter, Chlamydiae,
Yersinia pestis (plague), Vibrio cholerae (cholera) and other
atypical organisms
• To treat respiratory tract infections caused by Mycoplasma
pneumoniae
• As a growth promoter in animals.
22. Use of Tetracyclines
• Because many strains of microorganisms are now
resistant to some tetracyclines, culture and susceptibility
testing is recommended before beginning treatment.
• Doxycycline is a tetracycline that may be considered
when penicillin is contraindicated.
23. Antibiotics - Aminoglycosides
• Aminoglycosides are natural or semisynthetic antibiotics
derived from actinomycetes.
• Aminoglycosides are potent, broad-spectrum antibiotics
that act through inhibition of protein synthesis.
• They are commonly used in combination with drugs
such as ampicillin.
• For example, gentamicin, an aminoglycoside antibiotic
that has gram-negative coverage, is used in
combination with both an agent against gram-positive
organisms and one that covers anaerobes. Because of
their potential nephrotoxicity, aminoglycosides should
be reserved as a last resort, for use in resistant or life-
threatening infections.
• In addition, aminoglycosides should be avoided during
pregnancy.
24.
25.
26. 2. Anti-Viral Agents
• Antiviral drugs are a class of medication used for
treating viral infections.
• Most antivirals target specific viruses, while a
broad-spectrum antiviral is effective against a
wide range of viruses.
• Unlike most antibiotics, antiviral drugs do not
destroy their target pathogen; instead they inhibit
its development.
27. Anti-viral
• Most of the antiviral drugs now available are
designed to help deal with
• HIV,
• herpes viruses,
• COVID-19,
• the hepatitis B and C viruses, and
• influenza A and B viruses.
• Researchers are working to extend the range of
antivirals to other families of pathogens.
28. Anti-viral
• Mechanism of Action (in combination or single
action)
• Inhibit viral attachment
• Prevent genetic copying of virus
• Prevent viral protein production, vital for
reproduction of virus.
30. Example of Anti-viral
• Antiherpesvirus
• acyclovir and ganciclovir
• Anti-influenza
• Amantadine and rimantadine Zanamivir, peramivir, and
oseltamivir
• Anti-HIV
• zidovudine, didanosine, zalcitabine, lamivudine, and
stavudine
• Anti Respiratory syncytial virus (RSV)
• Ribavirin
• Inteferon
• Represent a group of nonspecific antiviral proteins
produced by host cells in response to viral infections
31. 3. Anti-Fungal Agent
• Pharmaceutical fungicide used to treat and
prevent mycosis
• Fungi include mushrooms, yeasts & molds.
• Fungal infections or mycosis occur in
immunocompromised patients.
• Common examples include athlete's foot, ringworm.
• Histoplasmosis capsulatum, Aspergillosis,
Blastomycosis, & Candida albicans (oral thrush).
• Mode of action;
• killing the fungus
• preventing the fungus from growing
32. Example of Anti-Fungal drug
• Amphotericin
• Clotrimazole
• Fluconazole
• Griseofulvin
• Itraconazole
• Ketonazole
• Metronidazole
• Micronazole
• Nystatin
• Terbination
33. 4. Anti-parasites agent
• Antiparasitic drugs are a group of medications
used in the management and treatment of
infections by parasites, including protozoa,
helminths, and ectoparasites.
• Antiparasitic drugs include several classes of
drugs that cover a broad range of diseases
caused by parasites.
• Some common protozoa infections are malaria,
leishmaniasis, trypanosomiasis, amebiasis,
gardiasis and trichomoniasis.
•
34. Mode of action - Anti-parasites
• Anti malarial drugs differ depending on chemical
family to which they belong
• The 4-aminoquinoline deriatives work by inhibiting
deoxyribonucleic acid and ribonucleic acid
polymerase, enzymes essential to DNA and RNA
synthesis by the parasite cells.
35.
36. NON-AEROSOLIZED ANTI-INFECTIVE
DRUGS ANTI-TUBERCULOSIS AGENTS
• The standard approach to treating tuberculosis
(TB) today consists of multiple first line drugs
for a period of either 6 or 9 months.
• First line drugs are:
• Rifapentine
• Isoniazid
• Rifampin
• Ethambutol
• Pyrazinamide
• Streptomycin used to be a front-line drug, but has been
replaced by Rifapentine.
37. NON-AEROSOLIZED ANTI-INFECTIVE
DRUGS ANTI-TUBERCULOSIS AGENTS
• 9 Month approach
• Isoniazid and Rifampin are given for 9 months and in an initial
2 to 8 week period these two drugs are supplemented with one
of the other first line drugs.
• 6 Month approach
• Four drugs are used for 2 months followed by 4 months of
Isoniazid and Rifampin.
• There is an association of TB and HIV infection.
• Along with the disturbing increase in the number of TB
cases in conjunction with AIDS, there has been an
emergence of drug resistant strains of TB. The cure
rate is poor in this subset.