Lipitor with the birth control pill
Many women of reproductive age take a combined or progestogen-only oral contraceptive while also using a chronic medication such as Lipitor (Atorvastatin). The combination is generally fine at 10mg, 20mg, 40mg, 80mg, but a small number of medications can reduce contraceptive efficacy meaningfully and need either a backup method or a switch.
How Lipitor can affect contraceptive efficacy
Combined and progestogen-only contraceptives are metabolised through CYP3A4. Strong CYP3A4 inducers (some antiepileptics, rifampicin, St John's Wort) lower contraceptive plasma levels and reduce efficacy. Whether Atorvastatin acts on CYP3A4 determines whether Lipitor affects contraception. Most agents in Cardiovascular Medications have no clinically meaningful effect on the pill at 10mg, 20mg, 40mg, 80mg.
Practical guidance
According to the prescribing information for Atorvastatin, women on hormonal contraception should review Lipitor with the prescribing pharmacist or doctor. Where an interaction is documented, additional barrier contraception or switching to a non-oral method (IUD, implant) for the duration of Lipitor therapy is the standard mitigation.
Frequently asked questions
Will Lipitor make my pill less effective? ▾
Most Cardiovascular Medications medications at 10mg, 20mg, 40mg, 80mg do not affect oral contraceptive efficacy. The exceptions are CYP3A4-inducing drugs and a small number of others. The prescribing information for Atorvastatin states whether the interaction is meaningful.
Do I need a backup contraceptive on Lipitor? ▾
Backup contraception is needed only when there is a documented interaction between Lipitor and the contraceptive method. For most users at 10mg, 20mg, 40mg, 80mg, no backup is required. The pharmacist confirms whether Atorvastatin interacts with hormonal contraception.
More on Lipitor
- With alcoholLipitor and alcohol — is it safe to drink?
- With foodShould Lipitor be taken with food?
- Side effectsLipitor side effects: common, rare and warning signs
- Dosage guideLipitor dosage guide: how much to take and when
- OnsetHow fast does Lipitor start working?
- DurationHow long does Lipitor last?
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.