Clopidogrel (Plavix) is an antiplatelet drug that inhibits ADP and prevents platelet aggregation and activation. It is metabolized in the liver and used as a first line treatment after MI to help prevent new MIs. It can be combined with aspirin and used with stents. Bleeding is the main risk, which is increased when combined with other drugs like aspirin, NSAIDs, SSRIs, or proton pump inhibitors that interact through the CYP2C19 pathway. Improving communication between providers and educating patients and insurance companies can help manage the risks.
Clopivas (Clopidogrel Bisulfate Tablets) is used to prevent blood clots forming in hardened blood vessels and is used to treat the medical conditions Acute Coronary Syndrome and Recent MI, Recent Stroke or Established Peripheral Arterial Disease.
Introduction to diuretics.
Therapeutic approaches.
Normal physiology of urine formation.
Classification of drugs .
Mechanism of action of Acetazolamide.
Mechanism of action of Thiazides.
Mechanism of action of Loop diuretics.
Mechanism of action of potassium sparing diuretics &aldosterone antagonists.
Ticagrelor in acute myocardial infarctionVasif Mayan
Potential benefits of dual antiplatelet therapy beyond 1 year after an MI has not been studied
Patients with MI are at increased risk of RECURRENT ISCHAEMIC EVENTS
Intensive secondary prevention is theoretically beneficial
Finding an ideal drug with best risk-benefit ratio is a challenge
TICAGRELOR
--- Direct acting
Not a pro-drug; does not require metabolic activation
Rapid onset of inhibitory effect on the P2Y12 receptor
Greater inhibition of platelet aggregation than clopidogrel
--- Reversibly bound
Degree of inhibition reflects plasma concentration
Faster offset of effect than clopidogrel
Functional recovery of circulating platelets within ~48 hours
PLATO trial
PEGASUS TIMI trial
Clopivas (Clopidogrel Bisulfate Tablets) is used to prevent blood clots forming in hardened blood vessels and is used to treat the medical conditions Acute Coronary Syndrome and Recent MI, Recent Stroke or Established Peripheral Arterial Disease.
Introduction to diuretics.
Therapeutic approaches.
Normal physiology of urine formation.
Classification of drugs .
Mechanism of action of Acetazolamide.
Mechanism of action of Thiazides.
Mechanism of action of Loop diuretics.
Mechanism of action of potassium sparing diuretics &aldosterone antagonists.
Ticagrelor in acute myocardial infarctionVasif Mayan
Potential benefits of dual antiplatelet therapy beyond 1 year after an MI has not been studied
Patients with MI are at increased risk of RECURRENT ISCHAEMIC EVENTS
Intensive secondary prevention is theoretically beneficial
Finding an ideal drug with best risk-benefit ratio is a challenge
TICAGRELOR
--- Direct acting
Not a pro-drug; does not require metabolic activation
Rapid onset of inhibitory effect on the P2Y12 receptor
Greater inhibition of platelet aggregation than clopidogrel
--- Reversibly bound
Degree of inhibition reflects plasma concentration
Faster offset of effect than clopidogrel
Functional recovery of circulating platelets within ~48 hours
PLATO trial
PEGASUS TIMI trial
http://www.theheart.org/web_slides/1364595.do
A study on Thrombin Receptor Antagonist for Clinical Event Reduction in Acute Coronary Syndrome (TRACER) designed to determine whether vopaxar, when added to existing standard of care (eg, aspirin, clopidogrel) for preventing MI and stroke in patients with ACS, will provide additional benefit.
Generic Plavix Tablets (Clopivas) is an inhibitor of platelet activation and is used to prevent blood clots in coronary artery disease, peripheral vascular disease, and cerebrovascular disease.
ADRs
Classifications of ADRs
Thompson and DoTS system classification
Factors: age, gender, Co-morbidities, ethnicity, Pharmacogenetics,G6PD deficiency, porphyrias
Immunological reactions
Classifications
Epidemiology and pharmacovigilance of ADRs
Yellow card scheme,
Thalidomide tragedy
Factors that may raise or suppress suspicion of a drug
Non ventilatory management apart from ventilatory stratetegies are important in management of ARDS. Various trials for and against are there. describing these aspects
Leading the Way in Nephrology: Dr. David Greene's Work with Stem Cells for Ki...Dr. David Greene Arizona
As we watch Dr. Greene's continued efforts and research in Arizona, it's clear that stem cell therapy holds a promising key to unlocking new doors in the treatment of kidney disease. With each study and trial, we step closer to a world where kidney disease is no longer a life sentence but a treatable condition, thanks to pioneers like Dr. David Greene.
Global launch of the Healthy Ageing and Prevention Index 2nd wave – alongside...ILC- UK
The Healthy Ageing and Prevention Index is an online tool created by ILC that ranks countries on six metrics including, life span, health span, work span, income, environmental performance, and happiness. The Index helps us understand how well countries have adapted to longevity and inform decision makers on what must be done to maximise the economic benefits that comes with living well for longer.
Alongside the 77th World Health Assembly in Geneva on 28 May 2024, we launched the second version of our Index, allowing us to track progress and give new insights into what needs to be done to keep populations healthier for longer.
The speakers included:
Professor Orazio Schillaci, Minister of Health, Italy
Dr Hans Groth, Chairman of the Board, World Demographic & Ageing Forum
Professor Ilona Kickbusch, Founder and Chair, Global Health Centre, Geneva Graduate Institute and co-chair, World Health Summit Council
Dr Natasha Azzopardi Muscat, Director, Country Health Policies and Systems Division, World Health Organisation EURO
Dr Marta Lomazzi, Executive Manager, World Federation of Public Health Associations
Dr Shyam Bishen, Head, Centre for Health and Healthcare and Member of the Executive Committee, World Economic Forum
Dr Karin Tegmark Wisell, Director General, Public Health Agency of Sweden
CHAPTER 1 SEMESTER V PREVENTIVE-PEDIATRICS.pdfSachin Sharma
This content provides an overview of preventive pediatrics. It defines preventive pediatrics as preventing disease and promoting children's physical, mental, and social well-being to achieve positive health. It discusses antenatal, postnatal, and social preventive pediatrics. It also covers various child health programs like immunization, breastfeeding, ICDS, and the roles of organizations like WHO, UNICEF, and nurses in preventive pediatrics.
Defecation
Normal defecation begins with movement in the left colon, moving stool toward the anus. When stool reaches the rectum, the distention causes relaxation of the internal sphincter and an awareness of the need to defecate. At the time of defecation, the external sphincter relaxes, and abdominal muscles contract, increasing intrarectal pressure and forcing the stool out
The Valsalva maneuver exerts pressure to expel faeces through a voluntary contraction of the abdominal muscles while maintaining forced expiration against a closed airway. Patients with cardiovascular disease, glaucoma, increased intracranial pressure, or a new surgical wound are at greater risk for cardiac dysrhythmias and elevated blood pressure with the Valsalva maneuver and need to avoid straining to pass the stool.
Normal defecation is painless, resulting in passage of soft, formed stool
CONSTIPATION
Constipation is a symptom, not a disease. Improper diet, reduced fluid intake, lack of exercise, and certain medications can cause constipation. For example, patients receiving opiates for pain after surgery often require a stool softener or laxative to prevent constipation. The signs of constipation include infrequent bowel movements (less than every 3 days), difficulty passing stools, excessive straining, inability to defecate at will, and hard feaces
IMPACTION
Fecal impaction results from unrelieved constipation. It is a collection of hardened feces wedged in the rectum that a person cannot expel. In cases of severe impaction the mass extends up into the sigmoid colon.
DIARRHEA
Diarrhea is an increase in the number of stools and the passage of liquid, unformed feces. It is associated with disorders affecting digestion, absorption, and secretion in the GI tract. Intestinal contents pass through the small and large intestine too quickly to allow for the usual absorption of fluid and nutrients. Irritation within the colon results in increased mucus secretion. As a result, feces become watery, and the patient is unable to control the urge to defecate. Normally an anal bag is safe and effective in long-term treatment of patients with fecal incontinence at home, in hospice, or in the hospital. Fecal incontinence is expensive and a potentially dangerous condition in terms of contamination and risk of skin ulceration
HEMORRHOIDS
Hemorrhoids are dilated, engorged veins in the lining of the rectum. They are either external or internal.
FLATULENCE
As gas accumulates in the lumen of the intestines, the bowel wall stretches and distends (flatulence). It is a common cause of abdominal fullness, pain, and cramping. Normally intestinal gas escapes through the mouth (belching) or the anus (passing of flatus)
FECAL INCONTINENCE
Fecal incontinence is the inability to control passage of feces and gas from the anus. Incontinence harms a patient’s body image
PREPARATION AND GIVING OF LAXATIVESACCORDING TO POTTER AND PERRY,
An enema is the instillation of a solution into the rectum and sig
CRISPR-Cas9, a revolutionary gene-editing tool, holds immense potential to reshape medicine, agriculture, and our understanding of life. But like any powerful tool, it comes with ethical considerations.
Unveiling CRISPR: This naturally occurring bacterial defense system (crRNA & Cas9 protein) fights viruses. Scientists repurposed it for precise gene editing (correction, deletion, insertion) by targeting specific DNA sequences.
The Promise: CRISPR offers exciting possibilities:
Gene Therapy: Correcting genetic diseases like cystic fibrosis.
Agriculture: Engineering crops resistant to pests and harsh environments.
Research: Studying gene function to unlock new knowledge.
The Peril: Ethical concerns demand attention:
Off-target Effects: Unintended DNA edits can have unforeseen consequences.
Eugenics: Misusing CRISPR for designer babies raises social and ethical questions.
Equity: High costs could limit access to this potentially life-saving technology.
The Path Forward: Responsible development is crucial:
International Collaboration: Clear guidelines are needed for research and human trials.
Public Education: Open discussions ensure informed decisions about CRISPR.
Prioritize Safety and Ethics: Safety and ethical principles must be paramount.
CRISPR offers a powerful tool for a better future, but responsible development and addressing ethical concerns are essential. By prioritizing safety, fostering open dialogue, and ensuring equitable access, we can harness CRISPR's power for the benefit of all. (2998 characters)
Navigating Challenges: Mental Health, Legislation, and the Prison System in B...Guillermo Rivera
This conference will delve into the intricate intersections between mental health, legal frameworks, and the prison system in Bolivia. It aims to provide a comprehensive overview of the current challenges faced by mental health professionals working within the legislative and correctional landscapes. Topics of discussion will include the prevalence and impact of mental health issues among the incarcerated population, the effectiveness of existing mental health policies and legislation, and potential reforms to enhance the mental health support system within prisons.
Medical Technology Tackles New Health Care Demand - Research Report - March 2...pchutichetpong
M Capital Group (“MCG”) predicts that with, against, despite, and even without the global pandemic, the medical technology (MedTech) industry shows signs of continuous healthy growth, driven by smaller, faster, and cheaper devices, growing demand for home-based applications, technological innovation, strategic acquisitions, investments, and SPAC listings. MCG predicts that this should reflects itself in annual growth of over 6%, well beyond 2028.
According to Chris Mouchabhani, Managing Partner at M Capital Group, “Despite all economic scenarios that one may consider, beyond overall economic shocks, medical technology should remain one of the most promising and robust sectors over the short to medium term and well beyond 2028.”
There is a movement towards home-based care for the elderly, next generation scanning and MRI devices, wearable technology, artificial intelligence incorporation, and online connectivity. Experts also see a focus on predictive, preventive, personalized, participatory, and precision medicine, with rising levels of integration of home care and technological innovation.
The average cost of treatment has been rising across the board, creating additional financial burdens to governments, healthcare providers and insurance companies. According to MCG, cost-per-inpatient-stay in the United States alone rose on average annually by over 13% between 2014 to 2021, leading MedTech to focus research efforts on optimized medical equipment at lower price points, whilst emphasizing portability and ease of use. Namely, 46% of the 1,008 medical technology companies in the 2021 MedTech Innovator (“MTI”) database are focusing on prevention, wellness, detection, or diagnosis, signaling a clear push for preventive care to also tackle costs.
In addition, there has also been a lasting impact on consumer and medical demand for home care, supported by the pandemic. Lockdowns, closure of care facilities, and healthcare systems subjected to capacity pressure, accelerated demand away from traditional inpatient care. Now, outpatient care solutions are driving industry production, with nearly 70% of recent diagnostics start-up companies producing products in areas such as ambulatory clinics, at-home care, and self-administered diagnostics.
3. Acute Coronary Syndromes
First line of defense
after previous MI
Treats stable and
unstable angina
Helps prevent new MI
Can be combined with
aspirin
Use with stents
http://humanbodydisease.com/ischemi
c-heart-disease-intro-795.html
4. Intended Drug Response
Irreversibly binds to
P2Y12 receptors on
platelet surfaces
Prevents ADP from
binding to receptors
Platelet inactive for life-
span (7-10 days)
Prevents clot formation
Thienopyridines block ADP receptors.
Source:Harvey, R; Champe, P “Lippincott
illustrated reviews: Pharmacology”, 4th
edition. LWW: 2009.
8. Pharmacokinetics
Easily absorbed from
intestine
50% available
6 hr half-life
Metabolized in liver
2 step process
85% inactive
Uses P450 enzymes
CYP2C19
Results in 2 hours
Steady state within 1 week
40 – 60 % platelet
inhibition in normal
metabolizers
Ultra rapid to poor
metabolizers
Stop at least 5 days before
invasive procedures
9. Drug Binding Issues
Any drugs that use the CYP2C19 enzyme for
metabolism
Most important: Proton pump inhibitors
Increased risk of clots
Omeprazole and esomeprazole worst
Pantoprazole better
10. Improving Communication
All insurance companies
involved in oversight
with pharmacists
Educate insurance
companies on the
benefit to risk ratio of
clopidogrel versus
warfarin
Encourage all providers
to communicate with
each other
Refine electronic
medical records to
either alert or allow all
providers access to
medication changes
Encourage patients to
report all medications
and side effects to all
providers
11. Home Health Care
Report new
medications found in
home to all providers
Educate patient
Need for med
Possible side effects
Update/report med list
Educate insurance
companies
12. References
Allerman, A.A. & Goldfarb, E.B. (2013). Anticoagulation disturbances. In V.P. Arcangelo & A.M.
Peterson (Eds.). Pharmacotherapeutics for advanced practice (3rd ed.) (pp. 764-803). Philadelphia, PA:
Lippincott, Williams, & Wilkins.
Brashers, V.L. (2014). Alterations in cardiovascular function. In McCance, K.L., Huether, S.E., Brashers,
V.L., & Rote, N.S. (Eds.). Pathophysiology: the biologic basis for disease in adults and children (7th ed.),
pp. 1129-1193. St. Louis, MO: Elsevier.
Reese, A.M. & Peterson, A.M. (2013). Chronic stable angina. In V.P. Arcangelo & A.M. Peterson (Eds.).
Pharmacotherapeutics for advanced practice. (3rd ed.) (pp. 263-277). Philadelphia, PA: Lippincott,
Williams, & Wilkins.
Rote, N.S., & McNance, K.L. (2014). Structure and function of the hematologic system. In McCance,
K.L., Huether, S.E., Brashers, V.L., & Rote, N.S. (Eds.). Pathophysiology: the biologic basis for disease in
adults and children (7th ed.), pp. 945-981. St. Louis, MO: Elsevier.
The Rx List. (2015). Plavix (clopidogrel bisulfate) tablets. Retrieved from,
http://www.rxlist.com/plavix-drug.htm
Wang, Z.Y., Chen, M., Zhu, L.L., Zeng, S., Xiang, M.X., & Zhou, Q. (2015). Pharmacokinetic drug
interactions with clopidogrel: updated review and risk management in combination therapy.
Theraputics and Clinical Risk Management, 11, pp.449-467. Doi:
http://dx.doi.org/10.2147/TCRM.S80437
Editor's Notes
Clopidogrel is in a class of drugs called antiplatelets. These drugs prevent platelet aggregation and stop clots from forming. Another drug from this class is aspirin; however, aspirin works on the COX receptors, and clopidogrel works by inhibiting adenosine phosphate (ADP). This prevents platelet aggregation and activation. Clopidogrel is metabolized in the liver and requires two steps to become an active drug. It is fast acting, but there is no antidote like there is for warfarin or heparin. The greatest risk if bleeding.
Clopidogrel is the first line of defense after an MI. It is used to treat the pathophysiology of atherosclerotic disease and prevent clot formation (thrombus) at the site of a plaque rupture. Most patients that have an MI have further cardiovascular disease that increases the risk for a new MI. This is the development and growth of atherosclerotic plaques. These plaques can grow and sometimes rupture. Clopidogrel prevents platelet aggregation at the site of the rupture to prevent a new occlusion from forming and blocking the coronary artery, thus preventing new ischemia.
After being metabolized in the liver, the active drug binds irreversibly to the P2Y12 receptors on platelet surfaces. These are the same receptors that ADP uses to bind to and active a platelet. By preventing the ADP from binding, clopidogrel prevents the platelet from activating or attracting more platelets for aggregation (platelet plug formation). The affected platelets are inactive for their life-span (7-10 days). By reducing the amount of platelets available for clotting, clopidogrel helps reduce clot formation and prevents further ischemia.
There are hundreds of drugs that can interact with clopidogrel. The most important drugs are warfarin, NSAIDs, SSRIs, and SNRIs which all increase the risk of bleeding. Proton pump inhibitors can interfere with clopidogrel’s mode of action because they uses the same metabolic pathway in the liver. They can prevent clopidogrel from inhibiting platelet aggregation. This may lead to an increased chance of an MI.
Bleeding is the most significant adverse reaction. This is increased when clopidogrel is combined with aspirin.
There are very few other side effects noted, and those that are reported do not appear to be common. The side effects listed here are from patient reports and have not been verified as caused by clopidogrel.
The FDA labeling states that clopidogrel is easily absorbed from the intestinal tract with or without food (The Rx List, 2015). It is metabolized in the liver in a two step process that produces only a small percentage of active drug. Some patients have defective CYP2C19 enzymes and are either ultra rapid or poor metabolizers. There are also normal and intermediate metabolizers. Poor metabolizers do not see the same aggregate benefits from clopidogrel and may be more at risk for an ischemic event. The drug begins working quickly, and it is readily available. It takes up to a week to reach a steady state, and produces 40 -60 % inhibition of platelet aggregation. Clopidogrel should be stopped at least 5 days before any procedures where bleeding is a risk. Seven to ten days is better.
Omeprazole and esomeprazole are strong inhibitors of the CYP2C19 enzyme and exert a greater inhibition on clopidogrel metabolism. Pantoprazole does not inhibit the enzyme as drastically.
Insurance companies do a type of audit with the pharmacist every quarter. This helps to keep the pharmacist and the insurance company on the same page in relation to the patient’s current medications. However, not all companies participate.
Educating the companies on the benefits of clopidogrel versus the lesser cost of warfarin may make providers more likely to prescribe this drug.
All doctors and providers should communicate with each other. They should especially let the primary care provider know of any medication changes.
Electronic medical records are supposed to help with continuity of care. Currently, there is no way for all medication information to be available to all healthcare providers. In the meantime, encouraging patients to report all medications, side effects, and changes will help to improve safety and outcomes.