Voltaren 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 Voltaren (Diclofenac). The combination is generally fine at 25mg, 50mg, 75mg, 100mg, but a small number of medications can reduce contraceptive efficacy meaningfully and need either a backup method or a switch.
How Voltaren 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 Diclofenac acts on CYP3A4 determines whether Voltaren affects contraception. Most agents in Pain Relief Medications have no clinically meaningful effect on the pill at 25mg, 50mg, 75mg, 100mg.
Practical guidance
According to the prescribing information for Diclofenac, women on hormonal contraception should review Voltaren 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 Voltaren therapy is the standard mitigation.
Frequently asked questions
Will Voltaren make my pill less effective? ▾
Most Pain Relief Medications medications at 25mg, 50mg, 75mg, 100mg do not affect oral contraceptive efficacy. The exceptions are CYP3A4-inducing drugs and a small number of others. The prescribing information for Diclofenac states whether the interaction is meaningful.
Do I need a backup contraceptive on Voltaren? ▾
Backup contraception is needed only when there is a documented interaction between Voltaren and the contraceptive method. For most users at 25mg, 50mg, 75mg, 100mg, no backup is required. The pharmacist confirms whether Diclofenac interacts with hormonal contraception.
More on Voltaren
- With alcoholVoltaren and alcohol — is it safe to drink?
- With foodShould Voltaren be taken with food?
- Side effectsVoltaren side effects: common, rare and warning signs
- Dosage guideVoltaren dosage guide: how much to take and when
- OnsetHow fast does Voltaren start working?
- DurationHow long does Voltaren last?
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.