Cardiovascular Medications 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 Cardiovascular Medications (Cardiovascular Medications). The combination is generally fine at 1mg, 2mg, 2.5mg, 3mg, 4mg, but a small number of medications can reduce contraceptive efficacy meaningfully and need either a backup method or a switch.
How Cardiovascular Medications 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 Amlodipine, Atorvastatin, Clopidogrel, Metoprolol, Rosuvastatin, Warfarin acts on CYP3A4 determines whether Cardiovascular Medications affects contraception. Most agents in Cardiovascular Medications have no clinically meaningful effect on the pill at 1mg, 2mg, 2.5mg, 3mg, 4mg.
Practical guidance
According to the prescribing information for Amlodipine, Atorvastatin, Clopidogrel, Metoprolol, Rosuvastatin, Warfarin, women on hormonal contraception should review Cardiovascular Medications 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 Cardiovascular Medications therapy is the standard mitigation.
Frequently asked questions
Will Cardiovascular Medications make my pill less effective? ▾
Most Cardiovascular Medications medications at 1mg, 2mg, 2.5mg, 3mg, 4mg do not affect oral contraceptive efficacy. The exceptions are CYP3A4-inducing drugs and a small number of others. The prescribing information for Amlodipine, Atorvastatin, Clopidogrel, Metoprolol, Rosuvastatin, Warfarin states whether the interaction is meaningful.
Do I need a backup contraceptive on Cardiovascular Medications? ▾
Backup contraception is needed only when there is a documented interaction between Cardiovascular Medications and the contraceptive method. For most users at 1mg, 2mg, 2.5mg, 3mg, 4mg, no backup is required. The pharmacist confirms whether Amlodipine, Atorvastatin, Clopidogrel, Metoprolol, Rosuvastatin, Warfarin interacts with hormonal contraception.
Medications in Cardiovascular Medications
More on Cardiovascular Medications
- With alcoholCardiovascular Medications and alcohol — is it safe to drink?
- With foodShould Cardiovascular Medications be taken with food?
- Side effectsCardiovascular Medications side effects: common, rare and warning signs
- For older adultsCardiovascular Medications after 60: doses and safety in older adults
- For womenCardiovascular Medications for women: indications and considerations
- For menCardiovascular Medications for men: indications and considerations
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.