This document provides an introduction to sustained release and controlled release drug formulations. It defines sustained release as slowly releasing a drug over 8-12 hours, while controlled release delivers a drug at a predetermined rate for a specified time period. Some key advantages of these formulations are improved patient compliance, better drug utilization, and decreased side effects. Physicochemical drug properties like solubility, permeability and stability can impact whether a drug is suitable for these delivery systems. The document discusses various approaches for sustained and controlled release based on these physicochemical factors.
pH-activated and Enzyme-activated drug delivery systemSakshiSharma250807
As per the syllabus of M.Pharma (1st sem.) I have presented the topic pH-activated and Enzyme-activated. This comes under rate-controlled drug delivery system under the subject Drug delivery system. Best wishes from Sakshi Sharma
This presentation includes the detail information about the physics of tablet compression and compaction, Compression, Effect of friction, distribution of forces, compaction profiles,solubility.
pH-activated and Enzyme-activated drug delivery systemSakshiSharma250807
As per the syllabus of M.Pharma (1st sem.) I have presented the topic pH-activated and Enzyme-activated. This comes under rate-controlled drug delivery system under the subject Drug delivery system. Best wishes from Sakshi Sharma
This presentation includes the detail information about the physics of tablet compression and compaction, Compression, Effect of friction, distribution of forces, compaction profiles,solubility.
M.pharm (Pharmaceutics) modern pharmacy unit-5 Study of consolidation parameters; Diffusion parameters, Dissolution
parameters and Pharmacokinetic parameters, Heckel plots, Similarity factors – f2
and f1, Higuchi and Peppas plot, Linearity Concept of significance, Standard
deviation , Chi square test, students T-test , ANOVA test
Factors affecting sustained release drug delivery system.Kavya S
contented and precise , Drug delivery system , sustained release preparation.factors like absorption, distribution ,metabolism , therapeutic window , absorption window.
Dr. A. SUMATHI - Transdermal Delivery of VaccinesSumathi Arumugam
M.Pharm - Drug Delivery System Syllabus includes Vaccine Delivery System. Transdermal Delivery of Vaccines is a part of vaccine delivery which describes the various barriers & approaches for delivery of vaccines via skin.
it provide a brief note on the drug excipient interaction and various technique to find it which is a part of preformulation studies. it gives help to mpharm(pharmaceutics) students. i.
M.pharm (Pharmaceutics) modern pharmacy unit-5 Study of consolidation parameters; Diffusion parameters, Dissolution
parameters and Pharmacokinetic parameters, Heckel plots, Similarity factors – f2
and f1, Higuchi and Peppas plot, Linearity Concept of significance, Standard
deviation , Chi square test, students T-test , ANOVA test
Factors affecting sustained release drug delivery system.Kavya S
contented and precise , Drug delivery system , sustained release preparation.factors like absorption, distribution ,metabolism , therapeutic window , absorption window.
Dr. A. SUMATHI - Transdermal Delivery of VaccinesSumathi Arumugam
M.Pharm - Drug Delivery System Syllabus includes Vaccine Delivery System. Transdermal Delivery of Vaccines is a part of vaccine delivery which describes the various barriers & approaches for delivery of vaccines via skin.
it provide a brief note on the drug excipient interaction and various technique to find it which is a part of preformulation studies. it gives help to mpharm(pharmaceutics) students. i.
Fundamental concept of modified drug releaseAbhinayJha3
Different Terminologies used in a modified release
1. Sustained release
2. Delayed release
3. Prolonged release
4. Extended-release
5. Controlled release
6. Site-specific targeting and receptor targeting
SELECTION OF DRUG CANDIDATE FOR ORAL SUSTAINED RELEASE SYSTEMS, BIOPHARMACEUTICAL CLASSIFICATION SYSTEM.
Fundamental concept of modified drug releaseAbhinayJha3
BIOPHARMACEUTICAL CLASSIFICATION SYSTEM
Different Terminologies used in a modified release
1. Sustained release
2. Delayed release
3. Prolonged release
4. Extended-release
5. Controlled release
6. Site-specific targeting and receptor targeting
Tom Selleck Health: A Comprehensive Look at the Iconic Actor’s Wellness Journeygreendigital
Tom Selleck, an enduring figure in Hollywood. has captivated audiences for decades with his rugged charm, iconic moustache. and memorable roles in television and film. From his breakout role as Thomas Magnum in Magnum P.I. to his current portrayal of Frank Reagan in Blue Bloods. Selleck's career has spanned over 50 years. But beyond his professional achievements. fans have often been curious about Tom Selleck Health. especially as he has aged in the public eye.
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Introduction
Many have been interested in Tom Selleck health. not only because of his enduring presence on screen but also because of the challenges. and lifestyle choices he has faced and made over the years. This article delves into the various aspects of Tom Selleck health. exploring his fitness regimen, diet, mental health. and the challenges he has encountered as he ages. We'll look at how he maintains his well-being. the health issues he has faced, and his approach to ageing .
Early Life and Career
Childhood and Athletic Beginnings
Tom Selleck was born on January 29, 1945, in Detroit, Michigan, and grew up in Sherman Oaks, California. From an early age, he was involved in sports, particularly basketball. which played a significant role in his physical development. His athletic pursuits continued into college. where he attended the University of Southern California (USC) on a basketball scholarship. This early involvement in sports laid a strong foundation for his physical health and disciplined lifestyle.
Transition to Acting
Selleck's transition from an athlete to an actor came with its physical demands. His first significant role in "Magnum P.I." required him to perform various stunts and maintain a fit appearance. This role, which he played from 1980 to 1988. necessitated a rigorous fitness routine to meet the show's demands. setting the stage for his long-term commitment to health and wellness.
Fitness Regimen
Workout Routine
Tom Selleck health and fitness regimen has evolved. adapting to his changing roles and age. During his "Magnum, P.I." days. Selleck's workouts were intense and focused on building and maintaining muscle mass. His routine included weightlifting, cardiovascular exercises. and specific training for the stunts he performed on the show.
Selleck adjusted his fitness routine as he aged to suit his body's needs. Today, his workouts focus on maintaining flexibility, strength, and cardiovascular health. He incorporates low-impact exercises such as swimming, walking, and light weightlifting. This balanced approach helps him stay fit without putting undue strain on his joints and muscles.
Importance of Flexibility and Mobility
In recent years, Selleck has emphasized the importance of flexibility and mobility in his fitness regimen. Understanding the natural decline in muscle mass and joint flexibility with age. he includes stretching and yoga in his routine. These practices help prevent injuries, improve posture, and maintain mobilit
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.
These simplified slides by Dr. Sidra Arshad present an overview of the non-respiratory functions of the respiratory tract.
Learning objectives:
1. Enlist the non-respiratory functions of the respiratory tract
2. Briefly explain how these functions are carried out
3. Discuss the significance of dead space
4. Differentiate between minute ventilation and alveolar ventilation
5. Describe the cough and sneeze reflexes
Study Resources:
1. Chapter 39, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 34, Ganong’s Review of Medical Physiology, 26th edition
3. Chapter 17, Human Physiology by Lauralee Sherwood, 9th edition
4. Non-respiratory functions of the lungs https://academic.oup.com/bjaed/article/13/3/98/278874
These lecture slides, by Dr Sidra Arshad, offer a quick overview of physiological basis of a normal electrocardiogram.
Learning objectives:
1. Define an electrocardiogram (ECG) and electrocardiography
2. Describe how dipoles generated by the heart produce the waveforms of the ECG
3. Describe the components of a normal electrocardiogram of a typical bipolar leads (limb II)
4. Differentiate between intervals and segments
5. Enlist some common indications for obtaining an ECG
Study Resources:
1. Chapter 11, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 9, Human Physiology - From Cells to Systems, Lauralee Sherwood, 9th edition
3. Chapter 29, Ganong’s Review of Medical Physiology, 26th edition
4. Electrocardiogram, StatPearls - https://www.ncbi.nlm.nih.gov/books/NBK549803/
5. ECG in Medical Practice by ABM Abdullah, 4th edition
6. ECG Basics, http://www.nataliescasebook.com/tag/e-c-g-basics
Ethanol (CH3CH2OH), or beverage alcohol, is a two-carbon alcohol
that is rapidly distributed in the body and brain. Ethanol alters many
neurochemical systems and has rewarding and addictive properties. It
is the oldest recreational drug and likely contributes to more morbidity,
mortality, and public health costs than all illicit drugs combined. The
5th edition of the Diagnostic and Statistical Manual of Mental Disorders
(DSM-5) integrates alcohol abuse and alcohol dependence into a single
disorder called alcohol use disorder (AUD), with mild, moderate,
and severe subclassifications (American Psychiatric Association, 2013).
In the DSM-5, all types of substance abuse and dependence have been
combined into a single substance use disorder (SUD) on a continuum
from mild to severe. A diagnosis of AUD requires that at least two of
the 11 DSM-5 behaviors be present within a 12-month period (mild
AUD: 2–3 criteria; moderate AUD: 4–5 criteria; severe AUD: 6–11 criteria).
The four main behavioral effects of AUD are impaired control over
drinking, negative social consequences, risky use, and altered physiological
effects (tolerance, withdrawal). This chapter presents an overview
of the prevalence and harmful consequences of AUD in the U.S.,
the systemic nature of the disease, neurocircuitry and stages of AUD,
comorbidities, fetal alcohol spectrum disorders, genetic risk factors, and
pharmacotherapies for AUD.
micro teaching on communication m.sc nursing.pdfAnurag Sharma
Microteaching is a unique model of practice teaching. It is a viable instrument for the. desired change in the teaching behavior or the behavior potential which, in specified types of real. classroom situations, tends to facilitate the achievement of specified types of objectives.
Explore natural remedies for syphilis treatment in Singapore. Discover alternative therapies, herbal remedies, and lifestyle changes that may complement conventional treatments. Learn about holistic approaches to managing syphilis symptoms and supporting overall health.
Report Back from SGO 2024: What’s the Latest in Cervical Cancer?bkling
Are you curious about what’s new in cervical cancer research or unsure what the findings mean? Join Dr. Emily Ko, a gynecologic oncologist at Penn Medicine, to learn about the latest updates from the Society of Gynecologic Oncology (SGO) 2024 Annual Meeting on Women’s Cancer. Dr. Ko will discuss what the research presented at the conference means for you and answer your questions about the new developments.
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
Prix Galien International 2024 Forum ProgramLevi Shapiro
June 20, 2024, Prix Galien International and Jerusalem Ethics Forum in ROME. Detailed agenda including panels:
- ADVANCES IN CARDIOLOGY: A NEW PARADIGM IS COMING
- WOMEN’S HEALTH: FERTILITY PRESERVATION
- WHAT’S NEW IN THE TREATMENT OF INFECTIOUS,
ONCOLOGICAL AND INFLAMMATORY SKIN DISEASES?
- ARTIFICIAL INTELLIGENCE AND ETHICS
- GENE THERAPY
- BEYOND BORDERS: GLOBAL INITIATIVES FOR DEMOCRATIZING LIFE SCIENCE TECHNOLOGIES AND PROMOTING ACCESS TO HEALTHCARE
- ETHICAL CHALLENGES IN LIFE SCIENCES
- Prix Galien International Awards Ceremony
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Ve...kevinkariuki227
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
ARTIFICIAL INTELLIGENCE IN HEALTHCARE.pdfAnujkumaranit
Artificial intelligence (AI) refers to the simulation of human intelligence processes by machines, especially computer systems. It encompasses tasks such as learning, reasoning, problem-solving, perception, and language understanding. AI technologies are revolutionizing various fields, from healthcare to finance, by enabling machines to perform tasks that typically require human intelligence.
3. INTRODUCTION:
WHAT IS DRUG DELEVERY SYSTEM?
ANS: The term “drug delivery systems”refers to technology utilized
to present the drug to the desired body site for drug release and
absorption
WHAT IS SUSTAINED RELEASE FORMULATIONS?
SRF Is describes the slow release of a drug substances from
a dosage form to maintain the therapeutic responses for extended
period that is for about 8-12 hours of time.
EX: ASPIRIN SR, DEXTRIN SR.
WHAT IS CONTROLLED RELEASE FORMULATIONS?
These are the formulations which delivers the drug at a
predetermined rate, for locally or systematically, for a specified
period of time
EX: PROZOSIN(MINI PRESS) MORPHINE SULPHATE.
5. CONCEPTOF SUSTAINEDRELEASEFORMULATIONS
The therapeutic blood or tissue levels of the
drug is maintained or accomplished by “zero order”
release dosage form, where the drug release is
independent of amount of drug in the delivery system
here the rate limiting step is the release of drug form
dosage form,here kr<<<ka
Dosage form kr target area ke
drug release elimination.
Where as,the first order depends on the release of
active ingredients immediately,and rate limiting step
is absorption of drug form the absorption pool.here
kr>>>ka
6. ADVANTAGES:
1.Improved Patient compliance:
a)less frequent dosing
b)Reduced night time dosing
C)Reduced patient care time.
2.Better drug utilization :
a)Reduction in total amount of drug administration.
b)maximum effect with minimum dose.
3)Improved efficiency in treatment:
A)Cure or control condition more prompt.
b)Decreased fluctuation in drug level
c)Minimised accumulation with chronic use
7. 4)Bioavailability of certain drugs can be enhanced.
5)Decreased local and systemic side effects.
Eg: decreased GI Irritation by SR-ASPIRIN tablets.
6)Increased safety margin of high potency drugs due to
better control of plasma levels.
7)Economy:
a)Reduction in health care costs (patient care)
b)shorter therapy
c)less frequent dosing.
8. Disadvantages:
1)Dose dumping which may lead to toxicity .It may occur
due to food , physiologic or formulation variation.
2) less flexibility in accurate dose adjustments depending
on patients condition.
3)Need for additional patient education like “Do not crush”
or “Do not chew”
4) Retrieval of drug is difficult in case of toxicity poisoning
or allergic reactions
5) Higher cost formulation.
6)patient to patient variation diseased state are not
considered in formulation.
9. •Physicochemical factors affecting cr/sr drug delivery system
sustained or controlled release
dosage systems that are designed to achieve a
prolonged therapeutic effect by continuously releasing
medication over an extended period of time after
administration of a single dose.
physicochemical properties of drugsare:
Aqueous solubility and Pka .
Partition coefficient.
Drug stability.
Protein binding.
molecular size and diffusivity.
Dose size.
Drug permeability.
Drug pka and ionization at physiological PΗ.
Mechanism of site of absorption
10. A drug with good aqueous solubility,especially if pΗ
independent,serves as good candidate for SR dosage
form.The drug to be absorbed it must firstly dissolve
in the aqueous phase surrounding the site of
administration and then partition into absorbing
membrane.This is governed by two properties i.e ,
aqueous solubility and its pka
Aqueous solubility influences its
dissolution rate, according to Noyes whitney equation.
dc/dt=KD A.CS
Where, dc/dt=dissolution rate.
kD =Dissolution rate constant
A=Total surface area,
CS=aqueous saturation solubility of drug.
11. Aqueous solubility of weak acids and bases is
governed by pka of compound and pΗ of solution.
According to pΗ theory , the unionized form of a drug
will be absorbed preferentially in a passive manner
through membranes.
Thus for acidic drugs absorption is favoured in acidic
environment and for basic drugs in basic environment.
The release of an ionisable drug must be programmed
in accordance with the pΗ variations across the GIT.
Drug existing largely in ionized forms are poor
candidates for sustained release.
Ex: Hexamethonium.
12. It is defined as the ratio of drug in oil
phase to that in aqueous phase.
K=CO /CW
Where,
CO =equilibrium concentration of drug in
organic phase.
CW = equilibrium concentration of drug in
aqueous phase.
Drugs with extremely high partition coefficient(oil
soluble) readily penetrates the membranes,but are
unable to proceed further.But drugs with high aqueous
solubility cannont penetrate the membranes.
A balance in K is needed to give an optimum
permeation through the biological membranes
13. According to Hansch correlation a parabolic relationship
between log of K with that of the log of its activity or
ability to be absorbed .
log
activity.
log K
Drugs unstable in gastric pΗ/GI environment cannot be
administered as oral CR formulation because of
bioavailability problems
ex:Nitroglycerine.
14. orally administered drugs can be
subjected to both acid-base hydrolysis and
enzymatic degradation.
Hence they may be designed considering their
transit in the GIT.
Localized delivery can be attained by bioadhesive
drug delivery systems and can act as reservoir of
drugs thus enhancing their bioavailability.
Drugs may be protected by incorporation in a
polymer matrix.
Prodrug concept is also used in designing
sustained release drug formulations.
15. Drug protein binding can serve as a depot
for drug producing a prolonged release profile,
especially if a high degree of drug binding occurs.
Drugs bound to mucin may increase absorption, if
the bound drug acts as a depot.
Drugs are plasma protein bound and their
distribution into extra vascular space is governed
by equilibrium process of dissociation of drug
from protein.
In general charged compounds have a greater
tendency to bind a protein.
Eg; 95% PPB of drugs are Diazepam,Dicoumal.
16. The ability of a drug to diffuse through
membranes is so called diffusivity.
Diffusivity is directly proportional to
molecular weight and inversely proportional
to molecular volume.
Large molecular weight-absorption is slower.
Smaller molecular weight-absorption is
faster.
17. LogD=Sv logV˖Kv
= Sm logM˖Km
Where,
D=Diffusivity
V=Molecular volume
M=Molecular weight
Sv, Kv, Km, Sm = Constant
The normal range of molecular weight is
150-400.
18. For oral dosage form a dose size of
0.5-1.80g is considered maximal. Higher
doses have to be given as liquids.
19. The three major drug characteristics that determine
the permeability of drugs for passive transport across
intestinal epithelium are:
Lipophilicity expressed as log k(o/w)
Polarity of drug which is measured by the number of
unionized drug molecules.
Molecular size
The properties interelate with above mentioned
properties which influence drug selection for CDDS
20. The pka range for acidic drugs whose
ionisation is pH sensitive is 3.0 to 7.5 and
that for basic drugs is 7.0 to 11.0
For optimum passive absorption, the drug
should be ionised at that site at least to an
extent 0.1 to 5%
Drug existing largely in ionised forms are
poor candidates for controlled delivery.
21. Drug absorbed by carrier mediated transport
process and those absorbed through a
window are poor candidates for CDDS
eg:several B vitamins.