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In this episode, we discuss the approach to deprescribing for several drugs such as benzodiazepine receptor agonists, cholinesterase inhibitors, memantine, antipsychotics, and antihyperglycemics.
Key Concepts
Medication appropriateness including indication and risk vs. benefit should be evaluated for all stages of life; however, more importantly in older individuals to address polypharmacy. There is an emerging trend of deprescribing networks that conduct research and provide evidence-based recommendations for how to deprescribe certain medications used for specific indications. Evidence-based deprescribing guidelines for PPIs, benzodiazepines, benzodiazepine receptor agonists, opioids, antipsychotics, cholinesterase inhibitors, memantine, and antihyperglycemics are available for patient-provider shared decision making. A general deprescribing approach is gradual tapering of the drug leading to discontinuation over several weeks while monitoring patients for withdrawal symptoms or benefits of discontinuation.References
http://deprescribing.org https://www.australiandeprescribingnetwork.com.au -
In this episode, we review the pharmacology, pharmacokinetics, adverse effects, monitoring, medicinal chemistry, and more of loop diuretics.
Key Concepts
Loop diuretics (furosemide, torsemide, bumetanide, ethacrynic acid) are the most potent type of diuretic and are used to relieve edema. Loop diuretics cause an increased loss of sodium, chloride, potassium, hydrogen, magnesium, and calcium ions into the urine. Excessive loss of these ions manifests as hypokalemia, hypomagnesemia, and metabolic alkalosis. Loop diuretics have an S-shaped dose response curve – a minimum dose is required for diuresis and a “ceiling” effect occurs at higher doses (leading to more ADRs). Doses should be individualized based on the clinical response of the patient. Ethacrynic acid is incorrectly used in patients with a “sulfa” allergy. The other loop diuretics contain a sulfa moiety but are safe for use in patients with “sulfa” allergy (e.g. allergy to sulfamethoxazole-trimethoprim). The TRANSFORM-HF trial strongly suggests that there is no clinical difference between furosemide and torsemide.References
Rachoin JS, Cerceo EA. Four nephrology myths debunked. J Hosp Med. 2011;6(5):E1-E5. doi:10.1002/jhm.703 Strom BL, Schinnar R, Apter AJ, et al. Absence of cross-reactivity between sulfonamide antibiotics and sulfonamide nonantibiotics. N Engl J Med. 2003;349(17):1628-1635. doi:10.1056/NEJMoa022963 Buggey J, Mentz RJ, Pitt B, et al. A reappraisal of loop diuretic choice in heart failure patients. Am Heart J. 2015;169(3):323-333. doi:10.1016/j.ahj.2014.12.009 Mentz RJ, Anstrom KJ, Eisenstein EL, et al. Effect of Torsemide vs Furosemide After Discharge on All-Cause Mortality in Patients Hospitalized With Heart Failure: The TRANSFORM-HF Randomized Clinical Trial. JAMA. 2023;329(3):214-223. doi:10.1001/jama.2022.23924 -
Fehlende Folgen?
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In this episode, we discuss principles for medication use in the geriatric patient population and summarize the updated 2023 American Geriatrics Society Beers Criteria for Potentially Inappropriate Medication Use in Older Adults.
Key Concepts
The Beer’s Criteria was originally developed by Dr. Mark Beers in 1991 to identify medications in which the risks may outweigh the benefits in nursing home patients. This list is now maintained by the American Geriatrics Society and includes a variety of drug safety information related to elderly patients including medications that are considered potentially inappropriate (Table 2 and 3), medications used with caution (Table 4), drug-drug interactions (Table 5), drugs with renal dose adjustments (Table 6), and drugs with anticholinergic properties (Table 7). The newest update prefers apixaban over other DOACs for VTE and atrial fibrillation in elderly patients. This is a very controversial recommendation given that other guidelines (e.g. from the ACC/AHA) have not published a similar preference of one DOAC over another. Many of the medications that are potentially inappropriate involve drugs that have anticholinergic properties and drugs that increase the risk of incoordination and falls. Other resources exist to guide drug therapy decisions in elderly patients. As an example, the STOPP/START criteria (published in the European Geriatric Medicine journal) outlines drugs to avoid but also drugs to consider in elderly patients.References
By the 2023 American Geriatrics Society Beers Criteria Update Expert Panel. American Geriatrics Society 2023 Updated AGS Beers Criteria for potentially inappropriate medication use in older adults. J AM Geriatr Soc. 2023;71(7):2052-2081. doi:10.1111/jgs.18372. O'Mahony D, Cherubini A, Guiteras AR, Denkinger M, Beuscart JB, Onder G, Gudmundsson A, Cruz-Jentoft AJ, Knol W, Bahat G, van der Velde N, Petrovic M, Curtin D. STOPP/START criteria for potentially inappropriate prescribing in older people: version 3. Eur Geriatr Med. 2023 Aug;14(4):625-632. doi: 10.1007/s41999-023-00777-y. -
In this episode, we discuss artificial intelligence large language models (LLMs) and how these will impact the future of the practice of pharmacy.
Key Concepts
Generative AI with large language models (LLMs) have already changed how healthcare is delivered to patients. In the future, these changes will be more substantial and require pharmacists and other healthcare professionals to understand the benefits and downsides of this technology. Commercial LLMs, such as ChatGPT, are not HIPAA compliant and should not be used with protected health information. Companies currently offer software products that are HIPAA compliant and can integrate directly into electronic health records in a HIPAA-compliant manner. Currently, most commercial use cases of LLMs for healthcare providers focus on expediting or simplifying the documentation process (e.g. generating a first draft of a progress note or summarizing a patient encounter from an audio recording). In the future, LLMs will be used to perform a variety of clinical tasks, including drug interaction checking, renal dose adjustments, duplication of therapy, and even the appropriateness of a patient’s drug regimen for a given medical condition. These clinical tasks will almost certainly be done as a “first pass” to highlight or flag specific aspects of a patient’s chart and will then be reviewed by a licensed (human) healthcare provider as a final check prior to clinical decisions being made.References
Large Language Models (LLMs) referenced in the episode: https://chat.openai.com, https://coral.cohere.com, https://claude.ai, https://gemini.google.com. Prompt Engineering Guide (https://www.promptingguide.ai/techniques) OpenAI - Prompt engineering (https://platform.openai.com/docs/guides/prompt-engineering/six-strategies-for-getting-better-results)
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In this episode, we review the pharmacology, indications, adverse effects, monitoring, and unique drug characteristics of HMG CoA reductase inhibitors (“statins”).
Key Concepts
Statins reduce LDL cholesterol by 20-60% (depending on the dose and statin potency). They have modest favorable effects on HDL and triglycerides. Clinically, statins reduce the risk of major adverse cardiac events by about 30% depending on the statin potency. There are four main groups of patients who are indicated for a statin: LDL >= 190 mg/dL, diabetes with age 40-75 years with LDL 70-189 mg/dL, those with an elevated 10-year ASCVD risk of > 7.5% (or possibly > 5%), and those who have had an ASCVD event (“secondary prevention”). Atorvastatin, lovastatin, and simvastatin heavily rely on CYP 3A4 metabolism and tend to be most susceptible to drug interactions compared to the other statins. When a statin is started, baseline lipid panel and liver function tests should be obtained. After 4-12 weeks, a lipid panel should be repeated. Liver function and creatine kinase testing should only be done if a patient has a symptom (e.g. jaundice, right upper quadrant pain, muscle pain or weakness, dark urine, etc.)References
Grundy SM, Stone NJ, Bailey AL, et al. 2018 AHA/ACC/AACVPR/AAPA/ABC/ACPM/ADA/AGS/APhA/ASPC/NLA/PCNA Guideline on the Management of Blood Cholesterol: A Report of the American College of Cardiology/American Heart Association Task Force on Clinical Practice Guidelines. Circulation. 2019;139(25):e1082-e1143. https://www.ahajournals.org/doi/10.1161/CIR.0000000000000625 -
In this recurring episode, we discuss the important updates from the 2024 American Diabetes Association Guidelines!
Key Concepts
Tirzepatide is now recommended as one of the weight loss pharmacotherapy options along with semaglutide in patients with diabetes. The language for its use in comparison to insulin therapy has been updated similar to GLP-1RAs. The new hypoglycemia section in chapter 6 now houses all recommendations regarding screening, education, prevention, and treatment of hypoglycemia. The recommendation for prescribing glucagon has been clarified - regardless of type of diabetes, it is recommended that glucagon be prescribed to all patients using insulin or those who are at high risk with proper education of family members or caregivers. Teplizumab, a monoclonal antibody against CD30, is available for preventing progression of stage 2 type 1 diabetes to stage 3 type 1 diabetes. Guidelines have updated screening criteria for staging type 1 diabetes and recommends use of teplizumab in these patients. Other updates revolve around emphasis of using diabetes technology such as CGMs and AID for appropriate patients, clarified or strengthened screening recommendations for type 1 staging, peripheral arterial disease, bone mass density, etc., and emphasis on weight management alongside meeting glycemic goals.References
American Diabetes Association. Standards of Care in Diabetes - 2024. Diabetes Care. 2024;47(1):S1-S322. Available at: https://diabetesjournals.org/care/issue/47/Supplement_1. -
In this episode, we speak with Janeen Winnike, the Associate Dean for Student Affairs at Rosalind Franklin and a co-course director for the Pharmacy Law course at the university. We review some of the key points regarding federal and Illinois pharmacy law – a must-listen especially for graduates preparing for their MPJE exam after graduation!
Key Concepts
The FDA (via the Food, Drug, and Cosmetic Act) primarily regulates manufacturers. Most regulation for pharmacies and pharmacists is via the federal Controlled Substances Act and state-based regulations (acts and administrative codes). An IND (investigational drug application) is required to begin human clinical trials (phase I-III). An NDA (new drug application) is used for the FDA to consider whether a drug should be approved for use in the US. The Federal Controlled Substances Act outlines which drugs are scheduled I-V. State law can be more restrictive. C-II drugs have special regulations related to prescribing, ordering/distribution, refills, partial fills, etc. In Illinois, pharmacists, student pharmacists, and pharmacy technicians are permitted to vaccinate patients aged 7 years and older (or temporarily 3 years and older per the PREP act for COVID-19 and influenza vaccines). Pharmacists can order and administer COVID-19 and influenza vaccines; other vaccines require a standing order or a prescription in order prior to administration in a pharmacy.References
Illinois Pharmacy Practice Act (225 ILCS 85) https://ilga.gov/legislation/ilcs/ilcs3.asp?ActID=1318&ChapterID=24 Illinois Pharmacy Practice Act Administrative Code (Part 1330): https://www.ilga.gov/commission/jcar/admincode/068/06801330sections.html Illinois Controlled Substances Act (720 ILCS 570) https://ilga.gov/legislation/ilcs/ilcs5.asp?ActID=1941&ChapterID=53 Illinois Controlled Substances Act Administrative Code (Part 3100) https://www.ilga.gov/commission/jcar/admincode/077/07703100sections.html Pharmacist’s Manual: An Informational Outline of the Controlled Substances Act. Drug Enforcement Administration. https://www.deadiversion.usdoj.gov/GDP/(DEA-DC-046R1)(EO-DEA154R1)_Pharmacist%27s_Manual_DEA.pdf -
In this episode, we review evidence-based guidelines for the emergency reversal of warfarin, dabigatran, and the oral Xa inhibitors (apixaban, edoxaban, and rivaroxaban).
Key Concepts
Reversal of anticoagulation is indicated in patients with major hemorrhage or when emergency surgery is necessary. Reversal of warfarin (Coumadin®) involves a fast-acting, short-term solution (usually prothrombin complex concentrates [PCC]) and a slower-acting, long-term solution (intravenous vitamin K). Idarucizumab (Praxbind®) is the preferred reversal strategy for dabigatran (Pradaxa®). Idarucizumab is a monoclonal antibody fragment specific that binds and inactivates dabigatran. If idarucizumab is unavailable, PCCs are recommended. Andexanet alfa (Andexxa®) is the preferred reversal strategy for oral Xa inhibitors and has FDA approval specific to apixaban and rivaroxaban. Andexanet alfa is a decoy factor Xa protein with higher binding affinity than human clotting factor Xa. There are several barriers to use with andexanet alfa that has led to low utilization in hospitals. If andexanet alfa is unavailable, PCCs are recommended.References
Baugh CW, et al. Anticoagulant Reversal Strategies in the Emergency Department Setting: Recommendations of a Multidisciplinary Expert Panel. Ann Emerg Med. 2020;76(4):470-485. Cuker A, Burnett A, Triller D, et al. Reversal of direct oral anticoagulants: Guidance from the Anticoagulation Forum. Am J Hematol. 2019;94(6):697-709. doi:10.1002/ajh.25475 Tomaselli GF, et al. 2020 ACC Expert Consensus Decision Pathway on Management of Bleeding in Patients on Oral Anticoagulants: A Report of the American College of Cardiology Solution Set Oversight Committee. J Am Coll Cardiol. 2020;76(5):594-622. -
In this two part episode, we review some of the most important clinical pearls in the pharmacotherapy and practice aspects of hormonal contraceptives with a brief focus on the very first FDA approved OTC hormonal contraceptive product (Opill).
Key Concepts (Part 2)
Missed dose instructions are particularly important with progestin only pills (POPs). Patients should take POPs at the same time (within 3 hours) each day - missing a dose beyond this 3 hour window is considered a missed dose and requires barrier contraception. There are a wide variety of hormonal contraception options for patients - each with its own unique advantages and disadvantages. Shared decision making between a healthcare provider and a patient is critical to selecting the most appropriate form of contraception! The CDC's Medical Eligibility Criteria (MEC) is an important resource to guide prescribers with regards to selecting hormonal contraception and also in identifying the clinical significance of a variety of drug interactions with hormonal contraception. One of the most important aspects of hormonal conctraception is adequate patient follow-up. Especially given the wide variety of hormonal contraception options, patients may need to switch their contraceptive multiple times until they find one that works best for them. Close follow-up and patient counseling are pivotal for helping a patient identify their optimal regimen.References
CDC Selected Practice Recommendations for Contraceptive Use. 2016. https://www.cdc.gov/mmwr/volumes/65/rr/rr6504a1.htm?s_cid=rr6504a1_w#B-1-1_down CDC Summary Chart of U.S. Medical Eligibility Criteria for Contraceptive Use. 2016. https://www.cdc.gov/reproductivehealth/contraception/mmwr/mec/summary.html -
In this two part episode, we review some of the most important clinical pearls in the pharmacotherapy and practice aspects of hormonal contraceptives with a brief focus on the very first FDA approved OTC hormonal contraceptive product (Opill).
Key Concepts (Part 1)
The effectiveness of contraceptives varies based on “ideal use” (e.g. in a clinical trial with optimal compliance) versus “typical use” (e.g. real-world effectiveness in patients who may sometimes be less adherent than in clinical trials). Oral, patch, and ring-based hormonal contraceptives (combination estrogen-progestin or progestin-only formulations) with “typical” use are about ~90% effective, meaning in one year there are ~10 unplanned pregnancies with these contraceptive options. When using an estrogen-based oral contraceptive, the estrogen dose should be initiated at a low dose (25 mcg or less per day of ethinyl estradiol). The dose of estrogen may need to be increased if breakthrough bleeding occurs in the early/mid cycle despite being on therapy for at least 6 months. Breakthrough bleeding later in the cycle is typically due to an inadequate progestin dose. In general, manufacturers do not provide multiple different formulations with different progestin doses; therefore, if late breakthrough does occur, an alternative formulation with a different progestin should be considered. If a patient misses one dose of a combination oral contraceptive, they should take the missed dose as soon as possible (even taking two doses at once if they remember when the next dose is due). If two or more doses are missed, the package insert should be consulted for instructions – management depends on the timing of the cycle, recency of unprotected sex, and other factors.References
CDC Selected Practice Recommendations for Contraceptive Use. 2016. https://www.cdc.gov/mmwr/volumes/65/rr/rr6504a1.htm?s_cid=rr6504a1_w#B-1-1_down CDC Summary Chart of U.S. Medical Eligibility Criteria for Contraceptive Use. 2016. https://www.cdc.gov/reproductivehealth/contraception/mmwr/mec/summary.html -
In this episode, we interview Scott Glosner, PharmD, MPH, BCPS about his extensive experience working at Pfizer in medical outcomes and as a field medical director. Dr. Glosner will share his career journey from a clinical pharmacist transitioning into the pharmaceutical industry in the late 1990s and what current pharmacists and students should know about a job in a pharmaceutical company.
Key Concepts
Pharmacists are playing an increasingly important role within the pharmaceutical industry. Prior clinical experience is a significant advantage to applicants for these positions. Key characteristics of a competitive pharmacist applicant for an industry position include strong communication skills, being perseverant (“tough skin”), being extremely persistent, and having real-world clinical experience. Different companies and job positions within industry often require differing amounts of prior experience. Applicants with more than several years of experience (or equivalent fellowship experience) may be more competitive for positions. Standing out in any way, whether board certification, doing research, networking, etc. is important for any applicant. In the future, pharmacists in industry may be playing a greater role in the oncology space, social determinants of health, emerging topics (such as gene therapy), and being capable of analyzing and interpreting “real world” clinical trial data.Questions for Dr. Scott Glosner? He can be reached at [email protected] or on LinkedIn (https://www.linkedin.com/in/scott-glosner-b743234).
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In this episode, we will discuss the definition of REMS (Risk Evaluation and Mitigation Strategies), why they exist, the role of FDA in administering REMS, types and examples of REMS, and how they impact pharmacy practice.
Key Concepts
The REMS (Risk Evaluation and Mitigation Strategies) program was developed in 2007 as part of the FDA’s drug risk management strategies designed to balance risk and benefits of certain drugs. Elements of REMS vary depending on the drug, but commonly include medication guides, communication plans, and other elements to assure safe use. REMS can require patients, providers, and pharmacies to take certain actions including training, registration, enrollment, safety monitoring, documentation of safety concerns, and follow prescribing and dispensing regulations. The FDA captures and assesses data on a regular basis to make changes in the REMS program. It also has authority to enforce compliance and take punitive actions against non-compliant parties.References
Risk Evaluation and Mitigation Strategies. Food and Drug Administration. May 16, 2023. Accessed October 17, 2023. https://www.fda.gov/drugs/drug-safety-and-availability/risk-evaluation-and-mitigation-strategies-rems -
In this episode, we review the role and indications of thrombolytics in acute ischemic stroke. The efficacy, safety, administration considerations, and cost between alteplase and tenecteplase are compared and contrasted.
Key Concepts
Alteplase (Activase) is a recombinant DNA version of human TPA (tissue plasminogen activator). Tenecteplase (TNKase) is similar to human TPA except it has three amino acid changes that result in a longer half-life and higher fibrin specificity. In patients with stroke, alteplase is given as a bolus followed by a 60-minute infusion. Tenecteplase is given as an IV bolus without the need for an infusion due to its longer half-life. Tenecteplase is at least as safe and effective as alteplase in acute ischemic stroke (with some studies showing greater benefit with tenecteplase). In patients with acute ischemic stroke who are candidates for mechanical thrombectomy, thrombolytics (with alteplase or tenecteplase) will still be given in patients who meet inclusion criteria and have no exclusion criteria.References
Powers WJ, Rabinstein AA, Ackerson T, et al. Guidelines for the Early Management of Patients With Acute Ischemic Stroke: 2019 Update to the 2018 Guidelines for the Early Management of Acute Ischemic Stroke: A Guideline for Healthcare Professionals From the American Heart Association/American Stroke Association [published correction appears in Stroke. 2019 Dec;50(12):e440-e441]. Stroke. 2019;50(12):e344-e418. doi:10.1161/STR.0000000000000211 Campbell BCV, Mitchell PJ, Churilov L, et al. Tenecteplase versus Alteplase before Thrombectomy for Ischemic Stroke. N Engl J Med. 2018;378(17):1573-1582. doi:10.1056/NEJMoa1716405 Kobeissi H, Ghozy S, Turfe B, et al. Tenecteplase vs. alteplase for treatment of acute ischemic stroke: A systematic review and meta-analysis of randomized trials. Front Neurol. 2023;14:1102463. Published 2023 Jan 23. doi:10.3389/fneur.2023.1102463 -
In this episode, we briefly review RSV (respiratory syncytial virus) infections and focus on new data supporting the use of two different RSV vaccines (Abrysvo and Arvexy) in preventing RSV infections in older adults and in pregnant women.
Key Concepts
RSV is a contagious respiratory virus that is usually mild and self-limiting in most patients but can cause severe disease especially in young children or older adults with certain risk factors. The FDA recently approved two vaccines for RSV (Abrysvo from Pfizer and Arexvy from GSK). The initial FDA approval was for adults 60 years of age and older; however, the FDA recently granted an additional indication for Abrysvo for pregnant women (to prevent the infant from severe RSV infection once born). When studied in older adults, both vaccines did meet efficacy criteria but the incidence of RSV infection was relatively low and thus the number needed to treat (NNT) is high. Both studies were done at times with lower RSV prevalence - the NNT would likely be more favorable during RSV outbreaks. Unlike Abrysvo, Arvexy (GSK) contains an adjuvant to improve the immune response. Although direct comparisons of efficacy and safety are not appropriate, Arvexy does appear to elicit more systemic adverse effects such as fever, myalgias, headache, and fatigue.References
Respiratory Syncytial Virus Infection (RSV). Centers for Disease Control and Prevention. https://www.cdc.gov/rsv/index.html Abrysvo (respiratory syncytial virus vaccine). US Food & Drug Administration. https://www.fda.gov/vaccines-blood-biologics/abrysvo Arexvy (respiratory syncytial virus vaccine, adjuvanted). US Food & Drug Administration. https://www.fda.gov/vaccines-blood-biologics/arexvy Use of Respiratory Syncytial Virus Vaccines in Older Adults: Recommendations of the Advisory Committee on Immunization Practices — United States, 2023. Morbidity and Mortality Weekly Report (MMWR). July 21, 2023 / 72(29);793-801. https://www.cdc.gov/mmwr/volumes/72/wr/mm7229a4.htm CDC. ACIP Recommendations. Last reviewed August 4, 2023. www.cdc.gov/vaccines/acip/recommendations.html. Accessed August 23, 2023. RENOIR - Walsh EE, Pérez Marc G, Zareba AM, et al. Efficacy and Safety of a Bivalent RSV Prefusion F Vaccine in Older Adults. N Engl J Med. 2023;388(16):1465-1477. doi:10.1056/NEJMoa2213836 AReSVi-006 - Papi A, Ison MG, Langley JM, et al. Respiratory Syncytial Virus Prefusion F Protein Vaccine in Older Adults. N Engl J Med. 2023;388(7):595-608. doi:10.1056/NEJMoa2209604 MATISSE - Kampmann B, Madhi SA, Munjal I, et al. Bivalent Prefusion F Vaccine in Pregnancy to Prevent RSV Illness in Infants. N Engl J Med. 2023;388(16):1451-1464. doi:10.1056/NEJMoa2216480 RSV-NET Interactive Dashboard. Centers for Disease Control and Prevention. https://www.cdc.gov/rsv/research/rsv-net/dashboard.html ACIP Meeting Information - Meeting Materials. https://www.cdc.gov/vaccines/acip/meetings/index.html -
In this episode, together with our faculty colleague, Dr. Roberta Dume, PharmD, BCPP, we discuss the pharmacologic options and evidence for the treatment of opioid use disorder (OUD) and how pharmacists play a vital role in assisting patients suffering from opioid use disorder.
Key Concepts
The treatment for OUD should be provided by either the treating clinician or a certified Opioid Treatment Provider (OTP) using one of three FDA-approved therapies which include buprenorphine, methadone, and naltrexone. Selection of the OUD treatment depends on availability of treatment provider; pharmacologic agent specific factors such as efficacy, dose titration, safety, and need for detoxification; and patient factors such as ability to safe-keep medications, adherence to required clinic visits, or presence of comorbidities. Pharmacists can play an important role for patients needing OUD by providing treatment education, treatment induction, monitoring treatment outcomes, harm reduction by providing naloxone and related education, and utilizing preventative strategies such as monitoring opioid use, offering non-opioid pain management options, and promoting safe storage and disposal of opioids.References
SAMHSA. Tip 63. https://store.samhsa.gov/sites/default/files/pep21-02-01-002.pdf SAMHSA. Medications for substance use disorders. https://www.samhsa.gov/medications-substance-use-disorders NIDA. Medications to treat opioid use disorder research report. How effective are medications to treat opioid use disorder? https://nida.nih.gov/publications/research-reports/medications-to-treat-opioid-addiction/efficacy-medications-opioid-use-disorder -
In this episode, we announce the second iteration of the HelixTalk Drug Superlative Awards -- awards given to medications on the market that are outstanding or notorious. In announcing these completely fictitious awards, we review key clinical pearls and pitfalls that every clinician should be aware of with these notable medications.
Key Concepts
The award for the most unique phase III patient population for a widely used medication goes to … Pneumovax-23 (PPSV-23) for its predecessor versions that were studied in South African novice gold miners. The award for the most misunderstood boxed warning goes to … all of the DOACs (but specifically apixaban and rivaroxaban). In particular, due to BOTH an increased risk of thrombosis and bleeding when switching from a DOAC to warfarin therapy in patients with atrial fibrillation. The award for the biggest difference between pharmacokinetic properties and pharmacodynamic effects goes to … aspirin due to its short-half life and short duration of analgesic effect and yet very prolonged antiplatelet effect. The award for the drug that should be dispensed with extra toilet paper … TIE between irinotecan and clindamycin. The most common dose-limiting adverse effect of irinotecan is diarrhea – loperamide is extensively used in these patients. Clindamycin earns the award because it is the antibiotic most associated with Clostridium difficile-associated diarrhea (CDAD).References
Smit P, Oberholzer D, Hayden-Smith S, Koornhof HJ, Hilleman MR. Protective efficacy of pneumococcal polysaccharide vaccines. JAMA. 1977;238(24):2613-2616.
Farrar JL, Childs L, Ouattara M, et al. Systematic Review and Meta-Analysis of the Efficacy and Effectiveness of Pneumococcal Vaccines in Adults. Pathogens. 2023;12(5):732. Published 2023 May 19. doi:10.3390/pathogens12050732 Pavia M, Bianco A, Nobile CG, Marinelli P, Angelillo IF. Efficacy of pneumococcal vaccination in children younger than 24 months: a meta-analysis. Pediatrics. 2009;123(6):e1103-e1110. doi:10.1542/peds.2008-3422 Deshpande A, Pasupuleti V, Thota P, Pant C, Rolston DD, Sferra TJ, Hernandez AV, Donskey CJ. Community-associated Clostridium difficile infection and antibiotics: a meta-analysis. J Antimicrob Chemother. 2013 Sep;68(9):1951-61. doi: 10.1093/jac/dkt129. -
There has been a lot of news about abortion (abortifacient) medications recently. Since the overturn of Roe v. Wade in 2022, individual states passed their own laws restricting access to abortion, this includes access to abortion medications. This clearly impacts the way pharmacists practice. In this episode, we summarize the science behind the two main abortive drugs, mifepristone and misoprostol, and provide a picture of how the access to these medications stand in the United States.
Key Concepts
Among other modalities to terminate pregnancies, medication abortion is a safe and alternative option that is picking up popularity given recent changes post-Dobbs vs. Jackson WHO decision. The FDA-approved use of combination mifepristone and misoprostol regimen to terminate pregnancy up to 70 days (10 weeks of gestation) is based on strong evidence for its efficacy and safety. Since the overturning of Roe vs. Wade in 2022, states have taken their own action to further restrict or increase access to abortion services including access to medication abortion. These legal changes further impact dispensing of mifepristone and misoprostol by pharmacists across the country adding to more confusion. Legal councils, state boards of pharmacies, or state pharmacy associations may serve as suitable resources to consult regarding these fast-changing laws.References
American College of Obstetricians and Gynecologists’ Committee on Practice Bulletins—Gynecology, Society of Family Planning. Medication Abortion Up to 70 Days of Gestation: ACOG Practice Bulletin, Number 225. Obstet Gynecol. 2020 Oct;136(4):e31-e47. doi: 10.1097/AOG.0000000000004082. PMID: 32804884. Kaiser Family Foundation. https://www.kff.org/womens-health-policy/fact-sheet/the-availability-and-use-of-medication-abortion Guttmacher Institute. https://www.guttmacher.org/state-policy/explore/overview-abortion-laws -
In this episode, we review the science behind genetic differences in humans in the CYP2D6 hepatic enzyme responsible for drug metabolism and how these genetic variants can lead to certain drugs being metabolized far too much or far too little, which can cause drug toxicities or a lack of effectiveness.
Key Concepts
About 20-25% of drugs on the market are metabolized by CYP2D6. Humans have a huge degree of variability in CYP2D6 metabolism ranging from “ultra” metabolizers to “poor” metabolizers. Drugs that heavily rely on CYP2D6 metabolism are prone to large variability in responses due to these genetic differences. Some drugs rely on metabolic inactivation of CYP2D6 whereas other drugs use the enzyme to become converted to a more active compound. Codeine and tramadol both heavily rely on CYP2D6 activation to a more potent opioid compound. Patients with excessive CYP2D6 activity will have toxicities (from too much of an active metabolite) whereas patients with low CYP2D6 activity will have little therapeutic effect. Numerous antidepressants (paroxetine, nearly all tricyclic antidepressants, and venlafaxine) rely on CYP2D6 metabolism. Differences in CYP2D6 metabolism have been shown to either cause toxicity or a lack of effectiveness with these medications.References
Chartrand R, Forte AM, Hoger JD, Kane SP, Kisor DF. Pharmacogenomics and Commonly Prescribed Medications. AdvanCE. October 10, 2022. https://www.advancepharmacist.com/courses/pharmacogenomics-and-commonly-prescribed-medications. Caudle KE, Sangkuhl K, Whirl-Carrillo M, et al. Standardizing CYP2D6 Genotype to Phenotype Translation: Consensus Recommendations from the Clinical Pharmacogenetics Implementation Consortium and Dutch Pharmacogenetics Working Group. Clin Transl Sci. 2020;13(1):116-124. doi:10.1111/cts.12692 Bousman CA, Stevenson JM, Ramsey LB, et al. Clinical Pharmacogenetics Implementation Consortium (CPIC) Guideline for CYP2D6, CYP2C19, CYP2B6, SLC6A4, and HTR2A Genotypes and Serotonin Reuptake Inhibitor Antidepressants [published online ahead of print, 2023 Apr 9]. Clin Pharmacol Ther. 2023;10.1002/cpt.2903. doi:10.1002/cpt.2903 Crews KR, Monte AA, Huddart R, et al. Clinical Pharmacogenetics Implementation Consortium Guideline for CYP2D6, OPRM1, and COMT Genotypes and Select Opioid Therapy. Clin Pharmacol Ther. 2021;110(4):888-896. doi:10.1002/cpt.2149 -
In this episode, we compare hydrochlorothiazide and chlorthalidone, but specifically from a cardiovascular outcomes perspective when used in patients with hypertension.
Key Concepts
Chlorthalidone, hydrochlorothiazide, and indapamide are available thiazide diuretics for treatment of hypertension; however, hydrochlorothiazide is the most commonly used agent. Chlorthalidone is more potent in reducing blood pressure but also is associated with a higher risk of electrolyte abnormalities compared to HCTZ. Recent studies for cardiovascular outcomes show that chlorthalidone is not better than HCTZ in preventing CV outcomes, but increases risk for hypokalemia, need for monitoring and even potassium supplementation.References
Ishani A, Cushman WC, Leatherman SM, et al. Chlorthalidone vs. Hydrochlorothiazide for Hypertension–Cardiovascular Events. N Engl J Med 2022; 387:2401-2410. DOI: 10.1056/NEJMoa2212270. https://www.nejm.org/doi/full/10.1056/NEJMoa2212270 Akbari P, Khorasani-Zadeh A. Thiazide Diuretics. In: StatPearls. Treasure Island (FL): StatPearls Publishing; 2023 Jan. Available from: https://www.ncbi.nlm.nih.gov/books/NBK532918/ -
In this episode, we discuss the concerns of QTc prolongation, which can cause a fatal arrhythmia called torsades de pointes (TdP). We cover the difference between QT and QTc, how to interpret a QTc (and when it is inaccurate), common medications that prolong QTc, and how pharmacists can evaluate the risk of QTc/TdP in patients who are receiving QTc-prolonging therapies.
Key Concepts
The QTc interval is the QT interval that has been “corrected” for heart rate. In nearly all cases, when describing a QT interval, it should be expressed as the QTc. Although a prolonged QTc is usually defined as a QTc exceeding 450-480 msec, the risk of torsades de pointes (TdP) begins to become concerning when the QTc is more than 500 msec, 15-20% longer than baseline, or if the QTc has increased by more than 60 msec. Vaughan-Williams Class III antiarrhythmics are most implicated in QTc prolongation and TdP risk. These therapies include sotalol, dofetilide, and dronedarone. Although amiodarone is a class III antiarrhythmic, its risk of TdP is quite low despite the fact that it often substantially prolongs the QTc. When pharmacists are assessing the risk of QTc prolongation and TdP, multiple factors (not just the QTc itself) should be considered. Risk scores, like the Tisdale Risk Score, as well as considering the risks/benefits of switching drug therapy, should be evaluated.References
CredibleMeds.com. Arizona Center for Education and Research on Therapeutics. http://crediblemeds.org. Noel ZR, See VY, Flannery AH. Walk the Line-The Importance of Well-Informed Interpretation of QT Prolongation. Ann Pharmacother. 2021;55(1):123-126. doi:10.1177/1060028020934718 E14 Clinical Evaluation of QT/QTc Interval Prolongation and Proarrhythmic Potential for Non-Antiarrhythmic Drugs. Food and Drug Administration (FDA). https://www.fda.gov/regulatory-information/search-fda-guidance-documents/e14-clinical-evaluation-qtqtc-interval-prolongation-and-proarrhythmic-potential-non-antiarrhythmic-0 - Mehr anzeigen
