Dispense As Written

Gregory Castelli
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Clinical trial breakdowns and evidence-based medicine for busy clinicians. I am an Associate Professor and Clinical Pharmacist. I review and translate the latest medical research into practical takeaways you can use. Every week, I cover new studies, examine controversial evidence, and answer your questions. No industry influence. No clickbait conclusions. Just honest analysis. WHAT YOU'LL FIND HERE: → Weekly clinical trial breakdowns → Evidence-based medicine concepts explained → Viewer Q&A on practice controversies PERFECT FOR: Physicians | Pharmacists | and All Medical Professions

  1. 5d ago

    Why Your NAD+ Supplement Is Hitting the Wrong Tissue

    Your NAD+ test kit is measuring the wrong tissue, and the supplement that's supposed to fix your Lp(a) ran this exact playbook thirty years before NMN existed. Two papers just went after the NAD+ anti-aging premise directly — one a full tissue-by-tissue review, one brand-new data from 300+ people across seven cohorts — and neither is kind to what's on the label. Join the Learn at Pinnacle app to earn FREE CE/CME credit for listening to this episode! Dispense As Written, LLC📱 @gregcastellipharmd (Instagram / TikTok)🐦 @gregcastellirx (X / Twitter)📩 dispensingevidence@gmail.com⚠️ This content is produced by Dispense As Written, LLC for educational purposes only. It is not medical advice and should not be used as the basis for clinical decisions. Gregory Castelli, PharmD, speaks as owner and educator; views do not represent any employer or institution. No pharmaceutical funding or sponsorship of any kind.#evidencebasedmedicine #dispenseaswritten #primarycare #familymedicine #internalmedicine #meded

  2. Sep 28

    Aspirin Alone After Joint Replacement — Ortho Was Right (EPCAT III)

    For years, orthopedic surgeons have been sending patients home on aspirin alone after hip and knee replacement— and most of us in primary care and hospital medicine have been quietly uncomfortable with it. EPCAT III is a 5,000-patient double-blind RCT that finally puts the question to rest. The answer might surprise the skeptics. 📊Symptomatic VTE: 0.48% aspirin alone vs. 0.45%rivaroxaban-aspirin (Risk difference 0.02 pp; 95% CI −0.34 to 0.39) 📊Noninferiority declared: upper CI 0.39 well inside the 0.7 ppmargin (P less than 0.001) 📊 Bleeding: 1.66% aspirin vs. 2.04% rivaroxaban-aspirin — numerically loweron aspirin (CI crosses zero) 📊Adherence: 92.2% of patients missed zero doses across both arms 📊Population: 96.6% standard VTE risk by STOP-VTE score — the generalizability frame that travels beyond Canada 📊 Castelli Coefficient: 7 / 10 New to noninferiority trial design? This episode includes a dedicated NI teaching diagram. For a deeper dive on how to read NI trials, watch: Understanding Noninferiority Trials — Dispense As Written   Shivakumar S, Matino D, ZukorD, et al. Rivaroxaban Then Aspirin vs. Aspirin Alone after Total Hip or KneeArthroplasty. N Engl J Med. 2026. DOI: 10.1056/NEJMoa2603649 https://doi.org/10.1056/NEJMoa2603649   Evidence-based medicine withoutthe fluff. Every video ends with the Castelli Coefficient — a verdict thatincorporates study design, statistical validity, and clinical applicability. Nopharmaceutical sponsorships. No conflicts of interest. Just the data.   Gregory Castelli, PharmD, FCCP,BCPS, BC-ADM, CDCES Associate Professor |Evidence-Based Medicine Educator Dispense As Written, LLC   📱 @gregcastellipharmd(Instagram / TikTok) 🐦 @gregcastellirx (X /Twitter) 📩dispensingevidence@gmail.com   ⚠️ This content is produced byDispense As Written, LLC for educational purposes only. It is not medicaladvice and should not be used as the basis for clinical decisions. GregoryCastelli, PharmD, speaks as owner and educator; views do not represent anyemployer or institution. No pharmaceutical funding or sponsorship of any kind.   #evidencebasedmedicine#dispenseaswritten #primarycare #familymedicine #internalmedicine #meded#clinicalpharmacy #VTE #jointreplacement#arthroplasty

  3. Sep 14

    Vaping Beats the Patch. But Does It Get Your Patient Off Nicotine? (Cochrane 2026)

    The Cochrane data is in: nicotine e-cigarettes beat nicotine replacement therapy for smoking cessation -- high-certainty evidence across 80 randomized controlled trials andnearly 30,000 patients. But there's a number buried in the results that the headlines missed, and your patients deserve to hear it.   In this episode, I break down the 2026 update of the Cochrane Living Systematic Review on e-cigarettes for smoking cessation (Lindson et al., 80 RCTs, 29,861 participants). We cover the three main comparisons, the safety data, and the critical distinction between quitting cigarettes and quitting nicotine. Lindson N, Livingstone-Banks J, Butler AR, McRobbie H, Bullen CR, Hajek P, et al. Electronic cigarettes for smoking cessation. Cochrane Database of Systematic Reviews 2026, Issue 8. Art. No.: CD010216. DOI: 10.1002/14651858.CD010216.pub11   https://doi.org/10.1002/14651858.CD010216.pub11 GregoryCastelli, PharmD, FCCP, BCPS, BC-ADM, CDCES Associate Professor | Evidence-Based Medicine Educator Dispense As Written, LLC   📱@gregcastellipharmd (Instagram / TikTok) 🐦@gregcastellirx (X / Twitter) 📩dispensingevidence@gmail.com   ⚠️ This content is produced by Dispense As Written, LLC for educational purposes only. It is not medical advice and should not be used as the basis for clinical decisions. Gregory Castelli, PharmD, speaks as owner and educator; views do not represent any employer or institution. No pharmaceutical funding or sponsorship of any kind.   #evidencebasedmedicine#dispenseaswritten #primarycare #familymedicine #internalmedicine #meded#clinicalpharmacy #smokingcessation#ecigarettes #vaping

  4. Aug 31

    The Guideline Came Before the Evidence | Ez-PAVE Trial Explained

    For years, guidelines have told clinicians to target an LDL below 55 mg/dL in patients with established cardiovascular disease. There was just one problem: no randomized trial had ever directly compared that target to the previous goal of less than 70. The 2026 ACC/AHA Dyslipidemia Guideline recommended the stricter number on March 13th. Ez-PAVE published in the New England Journal two weeks later.In this episode, we break down the Ez-PAVE trial — 3,048 patients with established ASCVD, randomized to LDL targets of less than 55 vs less than 70 mg/dL over three years. The composite primary endpoint was significant (HR 0.67, p = 0.002). CV death was not. All-cause mortality was flat. Revascularization drove the result. And 39% of patients in the intensive group never reached their own target. • Primary composite: 6.6% (intensive) vs 9.7% (conventional) — HR 0.67 (95% CI 0.52–0.86), p = 0.002• Absolute risk reduction: 3.1 percentage points over 3 years — NNT ≈ 32• CV death: HR 0.83 (95% CI 0.42–1.65) — not statistically significant• All-cause mortality: 2.0% vs 1.9% — no difference• Revascularization drove the composite: 4.8% vs 7.5% (HR 0.63)• Only 60.8% of intensive-group patients reached the 55 mg/dL target at 3 years• PCSK9 inhibitor use: just 2.3% in the intensive arm• Castelli Coefficient: 6.3/10Lee YJ, Lee SJ, Kim JW, et al. Intensive LDL Cholesterol Targeting in Atherosclerotic Cardiovascular Disease. N Engl J Med 2026;394:1365–75.DOI: 10.1056/NEJMoa2600283ClinicalTrials.gov: NCT04626973The content in this video is produced by Dispense As Written, LLC and is intended for educational purposes only. It does not constitute medical advice and should not be used as a substitute for the advice of a qualified healthcare professional. The views expressed are those of the host and do not represent those of any institution or employer. No pharmaceutical sponsorships. No conflicts of interest.#DispenseAsWritten #CastelliCoefficient #EvidenceBasedMedicine #EBM #MedEd #PrimaryCare #FamilyMedicine #InternalMedicine

  5. Aug 24

    Tirzepatide Is No Worse Than Dulaglutide. But What If Dulaglutide Wasn't Good to Begin With?

    SURPASS-CVOT made headlines for proving tirzepatide is non-inferior to dulaglutide for cardiovascular outcomes. But before you let that result drive your clinical decisions, there's a question nobody asked: what exactly was dulaglutide's CV evidence built on? The REWIND trial — the landmark Lancet 2019 RCT that put dulaglutide on the CV map — is the foundation. And when you look closely, the foundation is thinner than the guidelines suggest.9,901 patients, a 5.4-year follow-up, a MACE composite that barely cleared statistical significance after an interim alpha adjustment — and a North American subgroup that trended the wrong direction. The composite lived and died on a single endpoint: non-fatal stroke. CV death, MI, and all-cause mortality were all non-significant. REWIND earns a Castelli Coefficient of 5.5 / 10. Technically positive. Practically thin. And now you have the receipts.KEY FINDINGS• Primary composite MACE outcome: 12.0% dulaglutide vs. 13.4% placebo — HR 0.88 (95% CI 0.79–0.99); p=0.026 (adjusted threshold 0.0467 after interim alpha spend)• Absolute risk reduction: 1.4% over 5.4 years — NNT ~60• Non-fatal stroke drove the result: HR 0.76, p=0.017 — CV death (NS), MI (NS), all-cause mortality (NS)• USA + Canada subgroup: HR 1.14 (95% CI 0.89–1.47) — trending in the wrong direction in ~21% of the trial population• Only 31.5% had established cardiovascular disease — most of the trial was primary prevention• GI adverse events: 47.4% dulaglutide vs. 34.1% placeboLINKS & RESOURCESTrial citation: Gerstein HC et al. Dulaglutide and cardiovascular outcomes in type 2 diabetes (REWIND): a double-blind, randomised placebo-controlled trial. Lancet 2019; 394: 121–30. https://doi.org/10.1016/S0140-6736(19)31149-3SURPASS-CVOT episode: https://youtu.be/CLCpeJXUKNQ?si=biScjU7oXRQtSGezDispense As Written (DAW) is an independent, unsponsored evidence-based medicine channel hosted by Gregory Castelli, PharmD, FCCP, BCPS, BC-ADM, CDCES — Clinical Pharmacist and Associate Professor. Produced by Dispense As Written, LLC.DAW breaks down clinical trials, guidelines, and pharmacology with the same critical appraisal framework used to train clinicians and residents — without pharmaceutical sponsorships, without the fluff.📧 dispensingevidence@gmail.com📱 Instagram / TikTok: @gregcastellipharmd🐦 X / Twitter: @gregcastellirx💼 LinkedIn: gregcastellipharmdThe content produced by Dispense As Written, LLC is intended for educational and informational purposes only and does not constitute medical advice. The views expressed in this video are those of Dispense As Written, LLC and do not represent the views of any employer, academic institution, or affiliated organization. This content should not be used as a substitute for professional medical judgment. Always refer to primary literature, institutional guidelines, and clinical expertise when making patient care decisions. Dispense As Written, LLC has no financial relationships with pharmaceutical manufacturers. No content on this channel has been sponsored, reviewed, or approved by any drug manufacturer or commercial entity.#evidencebasedmedicine #dispenseaswritten #primarycare #familymedicine #internalmedicine #meded #clinicalpharmacy

  6. Aug 10

    Tirzepatide Has Better Metabolics. So Why Doesn't It Win?

    Your patient has type 2 diabetes, established cardiovascular disease, and has been on tirzepatide for two years. Their A1c is down, their weight is down, and their triglycerides are better than they've been in a decade. The question every clinician should be asking: is any of that metabolic improvement actuallytranslating into fewer heart attacks and strokes? SURPASS-CVOT is the first randomized cardiovascular outcomes trial for tirzepatide — and the answer is more complicated than the headlines suggest. In this episode we break down SURPASS-CVOT, a double-blind noninferiority trial comparing tirzepatide to dulaglutide in over 13,000 patients with type 2 diabetes and atherosclerotic cardiovascular disease. Tirzepatide was noninferior— meaning no worse than — dulaglutide on 3-point MACE (CV death, MI, stroke), but did not achieve superiority. Despite dramatically better A1c reduction, weight loss, and triglyceride lowering, the primary cardiovascular endpoint was essentially a tie. All-cause mortality did tell a different story, and that'swhere this paper gets interesting. We score this one a Castelli Coefficient of 7.5 / 10 — a well-designed trial that may not have taught us as much as we hoped. Key Findings ●     Primary endpoint (3-pointMACE): HR 0.92 (95.3% CI 0.83–1.01) —noninferior (p=0.003), not superior (p=0.09) ●     All-cause mortality: HR 0.84 (95% CI 0.75–0.94) — tirzepatide group 8.6% vs.dulaglutide 10.2% ★exploratory ●     MACE-4 (+revascularization): HR 0.88 (95% CI0.81–0.96) — statistically significant ●     Metabolic advantage —real, but didn't move the MACE needle: A1c−1.66% vs. −0.88%; weight −11.6% vs. −4.8%; triglycerides −24.2% vs. −10.2% ●     GI adverse events: 42.5% with tirzepatide vs. 35.9% with dulaglutide — morenausea and diarrhea ●     Generalizability caveat: Only 14.7% of patients enrolled in North America — the NAsubgroup HR was 1.01, the weakest of all regions   Links & Resources ●     Full paper: Nicholls SJ, et al. Cardiovascular Outcomes withTirzepatide versus Dulaglutide in Type 2 Diabetes. N Engl J Med2025;393:2409–20. https://doi.org/10.1056/NEJMoa2505928 ●     REWIND trial (dulaglutideCV outcomes vs. placebo): Gerstein HC, etal. Lancet 2019;394:121–30 ●     EBM Primers —Noninferiority Trials Explained: Watch on@dispenseaswritten [https://youtu.be/SpeVLfGrvFk?si=dzK-6OHunFv5eT8J]   About GregoryCastelli, PharmD, FCCP, BCPS, BC-ADM, CDCES Clinical Pharmacist | AssociateProfessor Produced by Dispense As Written, LLC   📺YouTube: @dispenseaswritten 📸 Instagram/TikTok: @gregcastellipharmd 🐦X/Twitter: @gregcastellirx 💼 LinkedIn: gregcastellipharmd 📧dispensingevidence@gmail.com   Legal Disclaimer ⚠ LEGAL DISCLAIMER — DO NOT MODIFY The content in this video is produced by Dispense As Written, LLC for educational purposes only and does not constitute medical advice. The views expressed are those of Dispense As Written, LLC and do not represent the views of any affiliated academic institution, employer, or health system. This content is not intended to diagnose, treat, cure, or prevent any disease. Always consult a qualified healthcare professional for clinical decision-making. Dispense As Written, LLC has no pharmaceutical sponsorships and maintains full editorial independence.

  7. Aug 3

    Psilocybin: Hype or Signal?

    A single 25 mg dose of psilocybin. One supervised session. And then — for the next six weeks — a clinically substantial reduction in depression scores, with no pill to refill and no daily adherence to manage. That's the claim from a Phase 2 RCT published in JAMA, and the numbers are hard to dismiss. The question isn't whether the signal is real. The question is whether you can trust it. This video breaks down the trial design, the primary outcome data, the safety profile, and the methodological problems that keep this from landing as a practice-changer. Centralized blinded raters, an active niacin comparator, and a 6-week follow-up make this the best-designed psilocybin trial to date. Sponsor-controlled data management, near-certain blinding failure, a 9-to-1 dropout differential, and a sustained remission rate that didn't reach significance in the primary analysis are the reasons the Castelli Coefficient lands at 7 — not higher.📊 KEY FINDINGS• MADRS reduction from baseline to day 43: −19.1 pts (psilocybin) vs −6.8 pts (niacin) — between-group difference −12.3 pts (95% CI −17.5 to −7.2)• Effect appeared by day 8 (−12.0 pt difference) and held flat through day 43 — no attenuation across any timepoint• Sustained response (≥50% reduction at all 4 post-dose visits): 42% psilocybin vs 11% niacin (OR 5.6; 95% CI 1.9–16.7)• Sheehan Disability Scale at day 43: −2.31 mean difference (95% CI −3.50 to −1.11) — real-world functional improvement in work, social, and home domains• Sustained remission (MADRS ≤10 at all 4 visits): 25% vs 9% — did not reach statistical significance in the primary ITT analysis (p = .05)• Severe adverse events: 8% psilocybin vs 0% niacin; no serious treatment-emergent adverse events; no suicidal behavior in either arm🔗 LINKS & RESOURCESFull paper: Raison CL, et al. Single-Dose Psilocybin Treatment for Major Depressive Disorder: A Randomized Clinical Trial. JAMA. 2023;330(9):843–853. DOI: 10.1001/jama.2023.14530⚕️ ABOUT DISPENSE AS WRITTENEvidence-based medicine without the fluff. Every video ends with the Castelli Coefficient — a verdict that incorporates study design, statistical validity, and clinical applicability. No pharmaceutical sponsorships. No conflicts of interest. Just the data. Gregory Castelli, PharmD, FCCP, BCPS, BC-ADM, CDCESAssociate ProfessorDispense As Written, LLC 📱 FIND USYouTube: @dispenseaswrittenInstagram / TikTok: @gregcastellipharmdX / Twitter: @gregcastellirxEmail: dispensingevidence@gmail.com⚠️ LEGAL DISCLAIMERThe content provided in this video is for educational and informational purposes only. It is intended for healthcare professionals and medical students as a supplement to — not a substitute for — clinical judgment, professional training, and the individualized care of patients. Nothing in this video constitutes medical advice, and it should not be used as the basis for any clinical decision regarding an individual patient. Always consult current clinical guidelines, institutional protocols, and your own clinical judgment when making treatment decisions. Gregory Castelli, PharmD, is speaking in his personal capacity as an educator. The views expressed do not represent the official positions of any affiliated institution. This channel has no affiliation with, and has received no funding or compensation from, any pharmaceutical manufacturer, device company, insurance company, or other commercial entity with a financial interest in the content discussed. Use of trade names is for identification purposes only and does not constitute endorsement. Produced by Dispense As Written, LLC.

  8. Jul 27

    Does Intermittent Fasting Work? Cochrane Finally Has Answers | 2026

    Intermittent fasting has been one of the most hyped dietary interventions of the past decade — promoted on podcasts, social media, and wellness blogs as a metabolic cure-all. But what does the highest-quality evidence actually say? In this episode, Gregory Castelli, PharmD, FCCP, BCPS, BC-ADM, CDCES, breaks down a 2026 Cochrane systematic review and meta-analysis that analyzed 22 randomized controlled trials and 1,995 participants to answer that question once and for all.Against regular dietary advice, intermittent fasting produced a mean weight loss difference of just −0.33% (95% CI −0.92 to +0.26) — a result that earned low-certainty evidence from Cochrane. Against no intervention, IF did produce more weight loss (MD −3.42%), but fell short of the 5% threshold considered clinically meaningful. No study in the review reported diabetes outcomes, patient satisfaction, or mortality. The Castelli Coefficient for this review: 6 out of 10. The methodology was rigorous — the evidence base wasn't.• 22 RCTs, 1,995 participants — outpatient settings across North America, Australia, Asia, and Europe (2016–2024)• vs. Regular Dietary Advice: MD −0.33% weight loss (95% CI −0.92 to +0.26); RR 0.98 for ≥5% reduction — LOW certainty• vs. No Intervention: MD −3.42% weight loss (95% CI −4.95 to −1.90) — MODERATE certainty, but below 5% MCID threshold• Quality of life: SMD +0.11 vs. dietary advice (95% CI −0.27 to +0.49) — LOW certainty; no meaningful difference• Adverse events: RR 1.45 vs. dietary advice (I² = 78%) — VERY LOW certainty• Zero studies reported participant satisfaction, diabetes status, or overall comorbidity outcomesGaregnani LI, Oltra G, Ivaldi D, Burgos MA, Andrenacci PJ, Rico S, Boyd M, Radler D, Escobar Liquitay CM, Madrid E. Intermittent fasting for adults with overweight or obesity. Cochrane Database of Systematic Reviews 2026, Issue 2. Art. No.: CD015610. DOI: 10.1002/14651858.CD015610.pub2Read the full review:https://doi.org/10.1002/14651858.CD015610.pub2Gregory Castelli, PharmD, FCCP, BCPS, BC-ADM, CDCES is a clinical pharmacist and Associate Professor with an extensive background in evidence-based medicine teaching at the residency and graduate level.Dispense As Written (DAW) — "Evidence-Based Medicine Without the Fluff." Every episode breaks down clinical trials, teaches EBM methodology, and gives you a defensible, patient-oriented bottom line. No pharmaceutical sponsorships. No substitutions for profit.Produced by Dispense As Written, LLCYouTube: @dispenseaswrittenInstagram / TikTok: @gregcastellipharmdX / Twitter: @gregcastellirxEmail: dispensingevidence@gmail.comThe content in this video is produced by Dispense As Written, LLC and is intended for educational purposes only. It does not constitute medical advice and should not be used as a substitute for the advice of a qualified healthcare professional. The views expressed are those of the host and do not represent those of any institution or employer.#DispenseAsWritten#EvidenceBasedMedicine #MedEd #primarycare #familymedicine #internalmedicine

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About

Clinical trial breakdowns and evidence-based medicine for busy clinicians. I am an Associate Professor and Clinical Pharmacist. I review and translate the latest medical research into practical takeaways you can use. Every week, I cover new studies, examine controversial evidence, and answer your questions. No industry influence. No clickbait conclusions. Just honest analysis. WHAT YOU'LL FIND HERE: → Weekly clinical trial breakdowns → Evidence-based medicine concepts explained → Viewer Q&A on practice controversies PERFECT FOR: Physicians | Pharmacists | and All Medical Professions

Information

  • Creator
    Gregory Castelli
  • Years Active
    2026
  • Episodes
    17
  • Rating
    Clean
  • Copyright
    © Gregory Castelli
  • Show Website
    Dispense As Written