Formulas A–Z
Medicines by active ingredient
Browse all 1697 medicines alphabetically by active ingredient — what each is, how it works, what it treats and what to watch for. Cross-linked to our drug-class guides and conditions.
Education and reference only. Dose-free. These pages explain medicines in plain language; doses and prescribing belong with your clinician, the BNF and the product labelling.
Looking to browse by drug class instead (e.g. statins, ACE inhibitors)? See Medicines & Prescribing Guides. For clinical calculators and risk scores, see Clinical Calculators.
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Answers
Frequently asked questions
What is a "formula" here?
A formula is the active ingredient — the generic medicine — such as atorvastatin or ramipril. One active ingredient can be sold under several brand names, so we cover the ingredient once (with its brands listed) rather than creating separate pages for each brand.
What is the difference between a formula and a brand?
The formula (e.g. atorvastatin) is the active ingredient; the brand (e.g. Lipitor) is a manufacturer's trade name for it. Generic and branded versions contain the same active ingredient.
Do these pages give doses?
No. Like the rest of the site, formula pages are dose-free — they explain what a medicine is, how it works, what it treats and what to watch for. Doses depend on the individual and belong with your prescriber, the BNF and the product labelling.
Where are the clinical formulas and scores?
Clinical formulas — calculators and risk scores such as eGFR or CHA₂DS₂-VASc — live in our Clinical Calculators section. This page covers drug (active-ingredient) formulas.
Want a medicines A–Z for your team?
We build evidence-led, dose-free medicine and formulary references on permitted data.