Free tool

Does this affect my pill?

Editorially reviewed on October 29, 2026. [TODO: medical reviewer]

Quick answer

Most common antibiotics do not stop the pill working. Some medicines do, mainly enzyme inducers such as rifampicin, some seizure medicines and St John's wort. Search yours below.

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Medicine or supplement

This list is not complete. Source: FSRH guidance on drug interactions.

Educational only. Talk to a doctor or pharmacist if unsure.

How it works

Based on FSRH (UK) guidance on drug interactions with hormonal contraception.^[src] The list is not complete. Always tell your doctor and pharmacist that you use hormonal birth control.

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This guide is for information. Talk to a doctor before starting, stopping or switching birth control.

Sources

Drug interactions with hormonal contraception (guideline), FSRH (UK) Added during build. [TODO: link the exact guideline page]