This document discusses adverse drug reactions and drug interactions. It defines an adverse drug reaction as an unintended, harmful response to a drug. Types of adverse reactions include side effects, toxic effects, intolerance, idiosyncrasy, allergic reactions, and iatrogenic diseases. Drug interactions occur when one drug alters the effects of another drug through pharmacokinetic or pharmacodynamic mechanisms. Pharmacokinetic interactions involve absorption, distribution, metabolism and excretion, while pharmacodynamic interactions involve drugs acting on the same receptors. The document emphasizes the importance of understanding adverse reactions and interactions to ensure safe drug use.
Principles and mechanisms of drug action. Receptor theories and classification of receptors, regulation of receptors. drug
receptors interactions signal transduction mechanisms, G protein–coupled receptors, ion channel receptor, transmembrane enzyme linked receptors,
transmembrane receptor and receptors that regulate
transcription factors, dose response relationship, therapeutic index, combined effects of drugs and factors modifying drug action.
Unit-1: General pharmacology :Introduction to pharmacologySabaShaikh76
Introduction to Pharmacology- Definition and scope of pharmacology, nature and source of drugs, essential drugs concept and routes of drug administration, spare receptors, addiction, tolerance, dependence, tachyphylaxis, idiosyncrasy, allergy
Principles and mechanisms of drug action. Receptor theories and classification of receptors, regulation of receptors. drug
receptors interactions signal transduction mechanisms, G protein–coupled receptors, ion channel receptor, transmembrane enzyme linked receptors,
transmembrane receptor and receptors that regulate
transcription factors, dose response relationship, therapeutic index, combined effects of drugs and factors modifying drug action.
Unit-1: General pharmacology :Introduction to pharmacologySabaShaikh76
Introduction to Pharmacology- Definition and scope of pharmacology, nature and source of drugs, essential drugs concept and routes of drug administration, spare receptors, addiction, tolerance, dependence, tachyphylaxis, idiosyncrasy, allergy
This presentation includes basic concepts about pharmacodynamics. It discusses about:
Definition of Pharmacodynamics
Types of drug tragets
Stay tuned for more!
An overview of muscarinic receptor agonists and antagonists. This presentation was delivered to 2nd year pharmacy students enrolled in a pharmacology & toxicology class and accompanies Goodman & Gilman's (12e) chapter 9.
Pharmacodynamic drug interactions, Ruqshan Nazneen, SUCPPARUL UNIVERSITY
Drug interactions is said to occur if affect of one drug is altered by co- administration of another drugs. These can result in either beneficial or harmful effects
CAUSES:
Wrong choice of drug
Multiple Prescribers
Errors in taking drugs
Transmission errors
Wrong route of administration
Wrong dosage
Failing to take account of renal function
Narrow therapeutic index of drugs
Co-morbidities
Polypharmacy
Drug whose activity is affected by such an interaction is called as Object drug and the agent which precipitates such an interaction is referred to as the Precipitant.
Simplified notes for all those struggling to grasp the pharmacological concepts .
These are self help notes that go straight to the point hence making medicine so simple you'd want to major further.
This presentation includes basic concepts about pharmacodynamics. It discusses about:
Definition of Pharmacodynamics
Types of drug tragets
Stay tuned for more!
An overview of muscarinic receptor agonists and antagonists. This presentation was delivered to 2nd year pharmacy students enrolled in a pharmacology & toxicology class and accompanies Goodman & Gilman's (12e) chapter 9.
Pharmacodynamic drug interactions, Ruqshan Nazneen, SUCPPARUL UNIVERSITY
Drug interactions is said to occur if affect of one drug is altered by co- administration of another drugs. These can result in either beneficial or harmful effects
CAUSES:
Wrong choice of drug
Multiple Prescribers
Errors in taking drugs
Transmission errors
Wrong route of administration
Wrong dosage
Failing to take account of renal function
Narrow therapeutic index of drugs
Co-morbidities
Polypharmacy
Drug whose activity is affected by such an interaction is called as Object drug and the agent which precipitates such an interaction is referred to as the Precipitant.
Simplified notes for all those struggling to grasp the pharmacological concepts .
These are self help notes that go straight to the point hence making medicine so simple you'd want to major further.
New Drug Discovery and Development .....NEHA GUPTA
The "New Drug Discovery and Development" process involves the identification, design, testing, and manufacturing of novel pharmaceutical compounds with the aim of introducing new and improved treatments for various medical conditions. This comprehensive endeavor encompasses various stages, including target identification, preclinical studies, clinical trials, regulatory approval, and post-market surveillance. It involves multidisciplinary collaboration among scientists, researchers, clinicians, regulatory experts, and pharmaceutical companies to bring innovative therapies to market and address unmet medical needs.
Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
Basavarajeeyam is an important text for ayurvedic physician belonging to andhra pradehs. It is a popular compendium in various parts of our country as well as in andhra pradesh. The content of the text was presented in sanskrit and telugu language (Bilingual). One of the most famous book in ayurvedic pharmaceutics and therapeutics. This book contains 25 chapters called as prakaranas. Many rasaoushadis were explained, pioneer of dhatu druti, nadi pareeksha, mutra pareeksha etc. Belongs to the period of 15-16 century. New diseases like upadamsha, phiranga rogas are explained.
- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
- Video recording of this lecture in Arabic language: https://youtu.be/Ve4P0COk9OI
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
- Link to NephroTube website: www.NephroTube.com
- Link to NephroTube social media accounts: https://nephrotube.blogspot.com/p/join-nephrotube-on-social-media.html
Muktapishti is a traditional Ayurvedic preparation made from Shoditha Mukta (Purified Pearl), is believed to help regulate thyroid function and reduce symptoms of hyperthyroidism due to its cooling and balancing properties. Clinical evidence on its efficacy remains limited, necessitating further research to validate its therapeutic benefits.
263778731218 Abortion Clinic /Pills In Harare ,sisternakatoto
263778731218 Abortion Clinic /Pills In Harare ,ABORTION WOMEN’S CLINIC +27730423979 IN women clinic we believe that every woman should be able to make choices in her pregnancy. Our job is to provide compassionate care, safety,affordable and confidential services. That’s why we have won the trust from all generations of women all over the world. we use non surgical method(Abortion pills) to terminate…Dr.LISA +27730423979women Clinic is committed to providing the highest quality of obstetrical and gynecological care to women of all ages. Our dedicated staff aim to treat each patient and her health concerns with compassion and respect.Our dedicated group ABORTION WOMEN’S CLINIC +27730423979 IN women clinic we believe that every woman should be able to make choices in her pregnancy. Our job is to provide compassionate care, safety,affordable and confidential services. That’s why we have won the trust from all generations of women all over the world. we use non surgical method(Abortion pills) to terminate…Dr.LISA +27730423979women Clinic is committed to providing the highest quality of obstetrical and gynecological care to women of all ages. Our dedicated staff aim to treat each patient and her health concerns with compassion and respect.Our dedicated group of receptionists, nurses, and physicians have worked together as a teamof receptionists, nurses, and physicians have worked together as a team wwww.lisywomensclinic.co.za/
Knee anatomy and clinical tests 2024.pdfvimalpl1234
This includes all relevant anatomy and clinical tests compiled from standard textbooks, Campbell,netter etc..It is comprehensive and best suited for orthopaedicians and orthopaedic residents.
CDSCO and Phamacovigilance {Regulatory body in India}NEHA GUPTA
The Central Drugs Standard Control Organization (CDSCO) is India's national regulatory body for pharmaceuticals and medical devices. Operating under the Directorate General of Health Services, Ministry of Health & Family Welfare, Government of India, the CDSCO is responsible for approving new drugs, conducting clinical trials, setting standards for drugs, controlling the quality of imported drugs, and coordinating the activities of State Drug Control Organizations by providing expert advice.
Pharmacovigilance, on the other hand, is the science and activities related to the detection, assessment, understanding, and prevention of adverse effects or any other drug-related problems. The primary aim of pharmacovigilance is to ensure the safety and efficacy of medicines, thereby protecting public health.
In India, pharmacovigilance activities are monitored by the Pharmacovigilance Programme of India (PvPI), which works closely with CDSCO to collect, analyze, and act upon data regarding adverse drug reactions (ADRs). Together, they play a critical role in ensuring that the benefits of drugs outweigh their risks, maintaining high standards of patient safety, and promoting the rational use of medicines.
The Gram stain is a fundamental technique in microbiology used to classify bacteria based on their cell wall structure. It provides a quick and simple method to distinguish between Gram-positive and Gram-negative bacteria, which have different susceptibilities to antibiotics
2. Adverse Drug Reaction
• Definition:
• WHO has defined an adverse drug reaction as “any response to a drug
that is noxious and unintended and that occurs at doses used in man
for prophylaxis, diagnosis or therapy.”
3. 1. Side Effects
• Side effects are unwanted effects of a drug that are extension of pharmacological effects and are seen
with the therapeutic dose of the drug. They are predictable, common and can occur in all people, e.g.
hypoglycaemia due to insulin; hypokalaemia following frusemide.
2. Toxic Effects
• Toxic effects are seen with higher doses of the drug and can be serious, e.g. morphine causes
respiratory depression in overdosage.
3. Intolerance
• Drug intolerance is the inability of a person to tolerate a drug and is unpredictable. Patients show
exaggerated response to even small doses of the drug, e.g. vestibular dysfunction after a single dose of
streptomycin may be seen in some patients. Intolerance could also be qualitative, e.g. idiosyncrasy and
allergic reactions.
4. Idiosyncrasy is a genetically determined abnormal reaction to a drug, e.g. primaquine
and sulfonamides induce haemolysis in patients with G6PD deficiency; some patients
show excitement with barbiturates.
Allergic reactions to drugs are immunologically- mediated reactions which are not
related to the therapeutic effects of the drug. The drug or its metabolite acts as an antigen
to induce antibody formation. Subsequent exposure to the drug may result in allergic
reactions. The manifestations of allergy are seen mainly on the target organs viz. skin,
respiratory tract, gastrointestinal tract, blood and blood vessels.
5. 4. Iatrogenic Diseases (Physician Induced):
These are drug induced diseases. Even after the drug is withdrawn, toxic effects can persist, e.g. isoniazid
induced hepatitis; chloroquine induced retinopathy. Drugs like chlorpromazine, haloperidol and other
phenothiazines and metoclopramide and reserpine can induce parkinsonism.
5. Drug Dependence
Drugs that influence the behavior and mood are often misused to obtain pleasurable effects. Repeated use of
such drugs result in dependence. Drug dependence is a state of compulsive use of drugs in spite of the
knowledge of the risks associated with its use. It is also referred to as drug addiction. Dependence could be
‘psychologic’ or ‘physical’ dependence.
Psychologic dependence is compulsive drug-seeking behavior to obtain its pleasurable effects, e.g.
cigarette smoking.
Physical dependence is said to be present when withdrawal of the drug produces adverse symptoms.
Stopping the drug results in ‘withdrawal syndrome.’ The symptoms of withdrawal syndrome are disturbing and
the person then craves for the drug, e.g. alcohol, opioids and barbiturates. Mild degree of physical
dependence is seen in people who drink too much of coffee.
6. 6. Teratogenicity
Teratogenicity is the ability of a drug to cause foetal abnormalities when administered to a
pregnant woman. The sedative thalidomide taken during early pregnancy for relief from morning
sickness resulted in thousands of babies being born with phocomelia (seal limbs). This
thalidomide disaster (1958-61) opened the eyes of drug licensing authorities and various nations
made it mandatory to conduct strict teratogenicity tests before a new drug is approved for use.
7. Carcinogenicity and Mutagenicity
Some drugs can cause cancers and genetic abnormalities. For example anticancer drugs can
themselves be carcinogenic; other examples are radioactive isotopes and some hormones.
8. Other Adverse Drug Reactions
Drugs can also damage various organ systems.
7. Drug interaction
• Definition:
• Drug interaction is the alteration in the duration or magnitude of the
pharmacological effects of one drug by another drug.
8. • When two or more drugs are given concurrently, the response may be
greater or lesser than the sum of their individual effects.
• Such responses may be beneficial or harmful. For example a
combination of drugs is used in hypertension—hydralazine +
propranolol for their beneficial interaction.
• But unwanted drug interactions may result in severe toxicity. Such
interactions can be avoided by adequate knowledge of their
mechanisms and by proper use of drugs.
9. Pharmacological basis of drug interactions
• The two major mechanisms of drug interactions include
pharmacokinetic and pharmacodynamics interactions
10. Pharmacokinetic mechanisms
• Alteration in the extent or duration of response may be produced by
influencing absorption, distribution, metabolism or excretion of one
drug by another.
11. Absorption
Absorption of drugs from the gut may be affected by:
a. Binding—Tetracyclines chelate iron and antacids resulting in
reduced absorption.
b. Altering gastric pH- Antacids raise gastric pH and interfere with the
absorption of drugs like iron and anticoagulants.
c. Altering GI motility- Atropine and morphine slow gastric emptying
and delay the absorption of drugs
12. Distribution
• Competition for plasma protein or tissue binding results in
displacement interactions, e.g. warfarin is displaced by
phenylbutazone from protein binding sites.
13. Metabolism
• Enzyme induction and inhibition of metabolism can both result in
drug interactions e.g. phenytoin, phenobarbitone, carbamazepine
and rifampicin are enzyme inducers while chloramphenicol and
cimetidine are some enzyme inhibitors
14. Excretion
• When drugs compete for the same renal tubular transport system,
they prolong each other’s duration of action, e.g. penicillin and
probenecid.
15. Pharmacodynamic mechanisms
• Drugs acting on the same receptors or physiological systems result in
additive, synergistic or antagonistic effects. Many clinically important
drug interactions have this basis.
16. Examples are-
Atropine opposes the effects of physostigmine.
Naloxone antagonises morphine.
Many diuretics produce hypokalaemia which potentiate digitalis toxicity.
Many antihistamines produce sedation which may be enhanced by
alcohol intake.
18. Pharmacovigilance
• Pharmacovigilance, also known as drug safety, is the pharmacological
science relating to the collection, detection, assessment, monitoring,
and prevention of adverse effects with pharmaceutical products.