Neurontin 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 Neurontin (Gabapentin). The combination is generally fine at 100mg, 300mg, 400mg, 600mg, 800mg, but a small number of medications can reduce contraceptive efficacy meaningfully and need either a backup method or a switch.
How Neurontin 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 Gabapentin acts on CYP3A4 determines whether Neurontin affects contraception. Most agents in Neurological Medications have no clinically meaningful effect on the pill at 100mg, 300mg, 400mg, 600mg, 800mg.
Practical guidance
According to the prescribing information for Gabapentin, women on hormonal contraception should review Neurontin 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 Neurontin therapy is the standard mitigation.
Frequently asked questions
Will Neurontin make my pill less effective? ▾
Most Neurological Medications medications at 100mg, 300mg, 400mg, 600mg, 800mg do not affect oral contraceptive efficacy. The exceptions are CYP3A4-inducing drugs and a small number of others. The prescribing information for Gabapentin states whether the interaction is meaningful.
Do I need a backup contraceptive on Neurontin? ▾
Backup contraception is needed only when there is a documented interaction between Neurontin and the contraceptive method. For most users at 100mg, 300mg, 400mg, 600mg, 800mg, no backup is required. The pharmacist confirms whether Gabapentin interacts with hormonal contraception.
More on Neurontin
- With alcoholNeurontin and alcohol — is it safe to drink?
- With foodShould Neurontin be taken with food?
- Side effectsNeurontin side effects: common, rare and warning signs
- Dosage guideNeurontin dosage guide: how much to take and when
- OnsetHow fast does Neurontin start working?
- DurationHow long does Neurontin last?
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.