In this episode, we review the pharmacology, indications, adverse effects, and unique drug characteristics of 5-HT3 receptor antagonists such as ondansetron (Zofran) and palonosetron (Aloxi).

Key Concepts

1. There are four 5-HT3 (serotonin subtype 3) receptor antagonists on the market: ondansetron, granisetron, dolasetron, and palonosetron. These have primarily been studied for acute chemotherapy-induced nausea and vomiting (within 24 hours of chemotherapy administration) and for post-operative nausea and vomiting.
2. When used for chemotherapy-induced nausea/vomiting, 5-HT3 receptor antagonists are given prior to chemotherapy (usually 30-60 minutes before) on day #1. They are not given on subsequent days because they are not as effective for delayed nausea and vomiting.
3. Palonosetron has the longest half-life, longer binding affinity to the 5-HT3 receptor, and trends towards having the best efficacy among the 5-HT3 receptor antagonists.
4. 5-HT3 receptor antagonists are associated with QTc prolongation and may cause headache, dizziness, constipation, or diarrhea. Their association with an increased risk of serotonin syndrome is controversial and not supported from a mechanistic perspective.

References

• Simino GP, Marra LP, Andrade EI, et al. Efficacy, safety and effectiveness of ondansetron compared to other serotonin-3 receptor antagonists (5-HT3RAs) used to control chemotherapy-induced nausea and vomiting: systematic review and meta-analysis. Expert Rev Clin Pharmacol. 2016;9(9):1183-1194. doi:10.1080/17512433.2016.1190271
• Tricco AC, Soobiah C, Blondal E, et al. Comparative efficacy of serotonin (5-HT3) receptor antagonists in patients undergoing surgery: a systematic review and network meta-analysis. BMC Med. 2015;13:136. Published 2015 Jun 18. doi:10.1186/s12916-015-0371-y
• Hesketh PJ, Kris MG, Basch E, et al. Antiemetics: ASCO Guideline Update. J Clin Oncol. 2020;38(24):2782-2797. doi:10.1200/JCO.20.01296
• Herrstedt J, Clark-Snow R, Ruhlmann CH, et al. 2023 MASCC and ESMO guideline update for the prevention of chemotherapy- and radiotherapy-induced nausea and vomiting. ESMO Open. 2024;9(2):102195. doi:10.1016/j.esmoop.2023.102195
• Rojas-Fernandez CH. Can 5-HT3 Antagonists Really Contribute to Serotonin Toxicity? A Call for Clarity and Pharmacological Law and Order. Drugs Real World Outcomes. 2014;1(1):3-5. doi:10.1007/s40801-014-0004-3
• Li WS, van der Velden JM, Ganesh V, et al. Prophylaxis of radiation-induced nausea and vomiting: a systematic review and meta-analysis of randomized controlled trials. Ann Palliat Med. 2017;6(2):104-117. doi:10.21037/apm.2016.12.01

In this episode, we review the newly published 2025 ACC/AHA hypertension guidelines.

Key Concepts

1. Instead of the Pooled Cohort Equations (PCE) from 2013, the 2025 hypertension guidelines recommend a new risk equation called PREVENT, which incorporates new risk factors and does not include race as part of the risk calculation.
2. The guidelines recommend starting two antihypertensive medications for initial therapy in stage II hypertension and one antihypertensive medication for stage I hypertension.
3. The guidelines no longer recommend specific first-line therapies for black patients. Instead, all patients without compelling indications should be initiated on a thiazide, ACE inhibitor, ARB, or dihydropyridine calcium channel blocker regardless of race/ethnicity.
4. All patients should have a blood pressure goal of

References

• Jones DW, Ferdinand KC, Taler SJ, Johnson HM, Shimbo D, Abdalla M, Altieri MM, Bansal N, Bello NA, Bress AP, Carter J, Cohen JB, Collins KJ, Commodore-Mensah Y, Davis LL, Egan B, Khan SS, Lloyd-Jones DM, Melnyk BM, Mistry EA, Ogunniyi MO, Schott SL, Smith SC Jr, Talbot AW, Vongpatanasin W, Watson KE, Whelton PK, Williamson JD. 2025 AHA/ACC/AANP/AAPA/ABC/ACCP/ACPM/AGS/AMA/ASPC/NMA/PCNA/SGIM Guideline for the Prevention, Detection, Evaluation and Management of High Blood Pressure in Adults: A Report of the American College of Cardiology/American Heart Association Joint Committee on Clinical Practice Guidelines. Circulation. 2025 Aug 14. doi: 10.1161/CIR.0000000000001356. Epub ahead of print. PMID: 40811497.

In this episode, we discuss the evidence, safety, and place in therapy of Journavx® (suzetrigine), a newly approved analgesic with a unique non-opioid mechanism of action and additional considerations for its use.

Key Concepts

1. Suzetrigine is a first in its class NaV1.8 sodium channel blocker approved for short-term (14 days or less) pain relief in adults with moderate-to-severe pain. Unlike opioids, suzetrigine is non-sedating and non-dependence forming.
2. Suzetrigine is taken as a whole pill without cutting, crushing, or chewing following a particular dosing schedule where the first dose is taken on an empty-stomach. The most common side effects of suzetrigine include pruritus, muscle spasms, increased CPK, rash, and transient (reversible) eGFR decrease.
3. Suzetrigine goes through CYP3A metabolism and therefore has significant interactions with CYP3A inducers and inhibitors. Use with strong inhibitors and moderate to strong inducers is not recommended. Dose reduction of suzetrigine is required if used with moderate inhibitors of CYP3A.
4. Although not formally adopted in a guideline recommendation, suzetrigine's current place in therapy can be moderate-to-severe acute pain relief in adult patients after NSAIDs/APAP options are exhausted, but before or in place of opioid therapy.

References

• Bertoch T, D'Aunno D, McCoun J, et al. Suzetrigine, a Nonopioid Na V 1.8 Inhibitor for Treatment of Moderate-to-severe Acute Pain: Two Phase 3 Randomized Clinical Trials. Anesthesiology. 2025;142(6):1085-1099. doi:10.1097/ALN.0000000000005460

In this episode, we review the pharmacology, indications, adverse effects, monitoring, and unique drug characteristics of angiotensin receptor blockers (ARBs).

Key Concepts

1. ARBs are equally efficacious as ACE inhibitors when used for hypertension, heart failure with reduced ejection fraction (HFrEF), chronic kidney disease (CKD) with proteinuria, and post-MI care. Some limited evidence suggests that they might be better in reducing albuminuria in patients with diabetes. ARBs are generally better tolerated than ACEi due to a lower risk of angioedema and dry cough.
2. While most ARBs are comparable to each other, small differences exists regarding hepatic metabolism (CYP metabolism for losartan, telmisartan, and azilsartan), degree of blood pressure lowering (generally better with azilsartan, olmesartan, valsartan, and candesartan), and additional pharmacological effects (telmisartan with PPAR-Y agonism, losartan with uricosuric effect).
3. ARBs are contraindicated in pregnancy, those with bilateral renal artery stenosis, and those with previous angioedema to ARBs. The most common adverse effects include hypotension and hyperkalemia, but in rare cases acute renal impairment can also occur.
4. Baseline serum creatinine and potassium should be monitored in patients taking ARBs. After initiation or dose adjustment, blood pressure, serum creatinine, and potassium should be repeated in 1-2 weeks. Signs and symptoms of hypotension as well as angioedema should be monitored throughout the treatment period.

In this episode, we discuss the diagnosis and treatment of resistant hypertension, including a newer endothelin receptor antagonist (ERA) called aprocitentan (Tryvio®).

Key Concepts

1. The diagnosis of true resistant hypertension is based on requiring more than 3 antihypertensives (ACE inhibitor or ARB + calcium channel blocker + diuretic) to achieve goal BP, ruling out inaccurate BP readings, and ensuring patient adherence to their antihypertensive therapy.
2. Non-pharmacologic therapy (especially dietary sodium restriction), medication adherence, and lifestyle changes are critical to the treatment of resistant hypertension.
3. The preferred 4th line option for most patients with resistant hypertension is spironolactone.
4. After adding spironolactone, additional therapies are based on expert opinion and patient-specific factors. These additional therapies may include beta blockers, alpha-2 agonists, alpha-1 blockers, hydralazine, minoxidil, and aprocitentan.

References

• Carey RM, Calhoun DA, Bakris GL, et al. Resistant Hypertension: Detection, Evaluation, and Management: A Scientific Statement From the American Heart Association. Hypertension. 2018;72(5):e53-e90. doi:10.1161/HYP.0000000000000084
• Mancia G, Kreutz R, Brunström M, et al. 2023 ESH Guidelines for the management of arterial hypertension The Task Force for the management of arterial hypertension of the European Society of Hypertension: Endorsed by the International Society of Hypertension (ISH) and the European Renal Association (ERA). J Hypertens. 2023;41(12):1874-2071. doi:10.1097/HJH.0000000000003480

In this episode, we discuss the very early stages of drug targets and drug development with Dr. Mohd Shahid, PhD. Dr. Shahid's research involves the IER3 gene, which is an important modulator of the body's inflammatory response via its action in major immune cells, including macrophages and T-cells, and plays a role in metabolic disorders such as obesity, diabetes, and atherosclerosis, revealing a previously unknown function of this protein.

Key Concepts

1. Drug development is a multi-decade journey – human clinical trials occur very late in the process. Drug development often starts before a drug molecule is even conceived by identifying potential drug targets.
2. Chronic inflammation is important for a variety of diseases, including obesity and atherosclerosis. Dr. Shahid's work focuses on a specific gene, Immediate Early Response 3 Gene (IER3 or IEX-1), and its role in modulating the inflammatory response in these disease states.
3. The research process frequently leads to unexpected discoveries and new lines of inquiry. With Dr. Shahid, his work in obesity and inflammation actually led to a new understanding of the IER3's role in the interplay between macrophages, inflammation, and energy expenditure.

References

• Shahid M, Javed AA, Chandra D, et al. IER3 deficiency induces browning of white adipose tissue and resists diet-induced obesity. Sci Rep. 2016;6:24135. Published 2016 Apr 11. doi:10.1038/srep24135
• Shahid M, Hermes EL, Chandra D, et al. J Am Heart Assoc. 2018;7:e009261. DOI: 10.1161/JAHA.118.009261.
• Ridker PM, Danielson E, Fonseca FA, et al. Rosuvastatin to prevent vascular events in men and women with elevated C-reactive protein. N Engl J Med. 2008;359(21):2195-2207. doi:10.1056/NEJMoa0807646
• Tardif JC, Kouz S, Waters DD, et al. Efficacy and Safety of Low-Dose Colchicine after Myocardial Infarction. N Engl J Med. 2019;381(26):2497-2505. doi:10.1056/NEJMoa1912388

In this episode, we review the new 2025 ACC/AHA Acute Coronary Syndrome (ACS) guidelines, with a particular focus on guideline recommendations for analgesics, P2Y12 inhibitors, parenteral anticoagulation, and lipid management.

Key Concepts

1. Nitrates and opioids are recommended for symptomatic relief of chest pain. Some patients may not be appropriate for nitrates (e.g. recent PDE-5 inhibitor use, hypotension, or right ventricular infarction). Opioids are used for nitrate-refractory angina but have a theoretical risk of delaying the effect of oral antiplatelet medications.
2. Prasugrel and ticagrelor are preferred P2Y12 inhibitors over clopidogrel in most patients. Patient-specific factors, including the use of PCI, play a role in P2Y12 inhibitor selection.
3. Anticoagulation with heparin is recommended in nearly all acute coronary syndrome (ACS) scenarios. Alternative anticoagulants may be used depending on whether PCI/CABG is planned and whether the anticoagulant is used prior to PCI/CABG ("upstream") or during the PCI procedure itself.
4. LDL goals after ACS have changed again. All ACS patients should have an LDL goal

References

• Rao SV, O'Donoghue ML, Ruel M, et al. 2025 ACC/AHA/ACEP/NAEMSP/SCAI Guideline for the Management of Patients With Acute Coronary Syndromes: A Report of the American College of Cardiology/American Heart Association Joint Committee on Clinical Practice Guidelines. Circulation. Published online February 27, 2025. https://www.ahajournals.org/doi/10.1161/CIR.0000000000001309

In this episode, we interview Morgan Anderson, PharmD, BCIDP, a graduate of the RFUMS College of Pharmacy, about her career path from a pharmacy resident, emergency medicine specialist, infectious diseases specialist, and now a medical sciences liaison.

The views, thoughts, and opinions expressed in this podcast are solely Dr. Anderson's own and do not necessarily reflect the views, positions, or policies of her employer. This podcast is conducted in a personal capacity, and any reference to her professional background is for context only.

Key Concepts

1. Having a wide breadth of skills and making yourself marketable is important when transitioning between jobs or career paths. Skills like communication and teamwork can be improved and are applicable to a wide variety of careers within pharmacy.
2. Medical Science Liaisons (MSLs) are a common role for pharmacists in the pharmaceutical industry. MSLs are field-based roles within the medical affairs department of the company. MSLs are medical and scientific experts who build collaborative relationships with key thought leaders, facilitate exchange of scientific information and insights, and serve as a conduit between these thought leaders and other areas of the company.
3. Two common career paths to pharmacists becoming an MSL are via a fellowship program or after years in clinical practice. A fellowship program provides a more structured approach, including mentoring and networking, with access to a variety of areas of the company outside of medical affairs. A pathway after clinical practice is more self-directed with less structure, but provides pharmacists with a strong clinical background that can be helpful in an MSL role.
4. Being a scientific communicator, possessing strong emotional intelligence, and being adaptable are critical soft skills that are essential for success in an MSL role. These soft skills can be improved with practice!

References

• https://www.industrypharmacist.org/

In this episode, we discuss the efficacy and safety of semaglutide and tirzepatide for weight loss with a particular focus on the legal, regulatory, and safety aspects of these "compounded" GLP-1 receptor agonist medications.

Key Concepts

1. Semaglutide and tirzepatide have growing evidence that their clinical benefits extend beyond the treatment of diabetes. Evidence now shows benefit in a variety of obesity-related disease states regardless of a patient's diabetes status.
2. Insurance coverage and drug cost is a major barrier to these medications, with cash prices exceeding $1000 per month in the US. There are many companies that are combining telemedicine visits with "compounded" GLP-1s to provide these medications at a reduced cost.
3. The Food, Drug, and Cosmetic (FD&C) Act regulates compounded drugs. These regulations provide the legal context for pharmacies to compound GLP-1 medications. These regulations describe who can compound, what drugs can be compounded, and other unique circumstances (e.g. compounding in the context of a drug shortage).
4. The FDA has released warnings regarding safety risks of compounded GLP-1s. The main safety concern is dosing errors; however, the warnings also include concerns of patients accessing drug products that are outside of the legal scope of the FD&C Act. The recent ADA statement recommends against the use of compounded GLP-1s due to these concerns.

References

• Karagiannis T, Malandris K, Avgerinos I, et al. Subcutaneously administered tirzepatide vs semaglutide for adults with type 2 diabetes: a systematic review and network meta-analysis of randomised controlled trials. Diabetologia. 2024;67(7):1206-1222. doi:10.1007/s00125-024-06144-1
• Müllertz ALO, Sandsdal RM, Jensen SBK, Torekov SS. Potent incretin-based therapy for obesity: A systematic review and meta-analysis of the efficacy of semaglutide and tirzepatide on body weight and waist circumference, and safety. Obes Rev. 2024;25(5):e13717. doi:10.1111/obr.13717
• Jastreboff AM, Le Roux CW, Stefanski A, et al. Tirzepatide for Obesity Treatment and Diabetes Prevention. New England Journal of Medicine. 2024. https://www.nejm.org/doi/full/10.1056/NEJMoa2410819
• Contract Year 2026 Policy and Technical Changes to the Medicare Advantage Program, Medicare Prescription Drug Benefit Program, Medicare Cost Plan Program, and Programs of All-Inclusive Care for the Elderly (CMS-4208-P). https://www.cms.gov/newsroom/fact-sheets/contract-year-2026-policy-and-technical-changes-medicare-advantage-program-medicare-prescription
• Human Drug Compounding. https://www.fda.gov/drugs/guidance-compliance-regulatory-information/human-drug-compounding
• Compounded Drug Products That Are Essentially Copies of a Commercially Available Drug Product Under Section 503A of the Federal Food, Drug, and Cosmetic Act. https://www.fda.gov/media/98973/download
• FDA alerts health care providers, compounders and patients of dosing errors associated with compounded injectable semaglutide products. https://www.fda.gov/drugs/human-drug-compounding/fda-alerts-health-care-providers-compounders-and-patients-dosing-errors-associated-compounded
• FDA's Concerns with Unapproved GLP-1 Drugs Used for Weight Loss. https://www.fda.gov/drugs/postmarket-drug-safety-information-patients-and-providers/fdas-concerns-unapproved-glp-1-drugs-used-weight-loss
• Nomination of Semaglutide Products to the Demonstrable Difficulties for Compounding Lists. https://www.regulations.gov/document/FDA-2017-N-2562-0029
• Neumiller JJ, Bajaj M, Bannuru RR, et al. Compounded GLP 1 and dual GIP/GLP 1 receptor agonists: A statement from the American Diabetes Association. Diabetes Care. 2024 Dec 2:dci240091. doi: 10.2337/dci24-0091.

In this episode, we review the recommendations from the 2024 SCCM/ASHP stress ulcer prophylaxis guidelines and highlight three of the more recent landmark critical care trials investigating the role of stress ulcer prophylaxis.

Key Concepts

1. After 25 years, the stress ulcer prophylaxis guidelines have been updated by SCCM and ASHP. These guidelines make 13 recommendations in a PICO format.
2. Three large, landmark randomized controlled trials (SUP-ICU, PEPTIC, and REVISE) have significantly contributed to the body of literature regarding stress ulcer prophylaxis.
3. The SCCM/ASHP guidelines recommend stress ulcer prophylaxis in patients with coagulopathy, shock, chronic liver disease, and possibly in neurocritical care patients. They do not specifically recommend prophylaxis in mechanically ventilated patients; this is a controversial recommendation.
4. The SCCM/ASHP guidelines equally prefer proton pump inhibitor (PPI) and histamine-2 receptor antagonists (H2RA) drug therapies given either intravenously or orally. The prophylaxis regimen should be continued until the indication for prophylaxis has resolved or the patient leaves the ICU.

References

• MacLaren R, Dionne JC, Granholm A, et al. Society of Critical Care Medicine and American Society of Health-System Pharmacists Guideline for the Prevention of Stress-Related Gastrointestinal Bleeding in Critically Ill Adults. Crit Care Med. 2024;52(8):e421-e430. doi:10.1097/CCM.0000000000006330
• SUP-ICU study. Krag M, Marker S, Perner A, et al. Pantoprazole in Patients at Risk for Gastrointestinal Bleeding in the ICU. N Engl J Med. 2018;379(23):2199-2208. doi:10.1056/NEJMoa1714919
• PEPTIC study. PEPTIC Investigators for the Australian and New Zealand Intensive Care Society Clinical Trials Group, Alberta Health Services Critical Care Strategic Clinical Network, and the Irish Critical Care Trials Group, Young PJ, Bagshaw SM, et al. Effect of Stress Ulcer Prophylaxis With Proton Pump Inhibitors vs Histamine-2 Receptor Blockers on In-Hospital Mortality Among ICU Patients Receiving Invasive Mechanical Ventilation: The PEPTIC Randomized Clinical Trial. JAMA. 2020;323(7):616-626. doi:10.1001/jama.2019.22190
• REVISE study. Cook D, Deane A, Lauzier F, et al. Stress Ulcer Prophylaxis during Invasive Mechanical Ventilation. N Engl J Med. 2024;391(1):9-20. doi:10.1056/NEJMoa2404245