Drug–Supplement Interactions

📚 Researched & cited by UV Editorial Team Independently reviewed · Last updated: July 20, 2026 · Our research methodology → Bottom line Pure Encapsulations licenses PEPID’s clinical drug-interaction database to power a Drug-Nutrient Interaction Checker that flags only clinically meaningful supplement-medication conflicts. Who it serves: practitioners first; patients benefit through guided reviews How it

Bottom line If you take multiple medications, the safest multivitamin is a third-party verified one that skips fat-soluble megadoses and hidden herbs — and any new multi is worth running past your pharmacist first. Certification: Choose USP Verified, NSF Certified, or ConsumerLab Approved products. Doses: Avoid high-dose vitamin A, E, or K if you take

Bottom line A daily symptom log paired with an interaction checker is the fastest way to catch drug–nutrient side effects early, and it gives your clinician concrete data to adjust treatment safely. Key features: interaction checker, custom symptom fields, reminders, secure PDF/CSV export. Top apps: Medisafe, CareClinic, Effecto, Bearable, MyRxProfile — plus StackMyMed, our own

Bottom line Combining Adderall with energy drinks or stimulant-heavy supplements can overstimulate your heart, raising the risk of palpitations, a racing heartbeat, and blood pressure spikes. The safest move is to avoid energy drinks entirely while on Adderall and keep other caffeine sources low. Highest risk: Stacking Adderall with caffeine, taurine, or guarana Symptoms to

Bottom line Apps built on the DrugBank API flag drug–supplement interactions more reliably because they use a large, professionally curated pharmacology database. Still, any app is a prompt to ask your pharmacist — not a substitute for one. What to check: the data source (DrugBank vs. an unvetted list), how often it updates, and whether

Bottom line Yes — some vegan supplements can interfere with levothyroxine, mainly iron, iodine-rich seaweed, and soy. The fix is timing: take your thyroid medication on an empty stomach and separate interfering supplements by about 4 hours. Levothyroxine: take on an empty stomach, 60 minutes before breakfast or 3+ hours after dinner Separate: keep iron,

Bottom line MyNetDiary is a solid way to log supplements and medications consistently, but it does not warn you about drug-supplement interactions — pair it with a dedicated interaction checker and confirm anything new with your pharmacist. MyNetDiary: easy all-in-one logging and reminders, no interaction alerts Manual checking: deeper analysis with severity ratings, but easy

Bottom line For most non-tech-savvy seniors, the Drugs.com Medication Guide is the easiest reliable interaction checker — and no app replaces a pharmacist review of your full medication list. Best overall: Drugs.com Medication Guide – phonetic search plus food-interaction alerts Reminders + caregivers: Medisafe – Medfriend alerts a loved one if a dose is missed