MAJOR — Use With Caution
Adrafinil and Hormonal Contraceptives — Major Interaction (Reduced Contraceptive Efficacy)
Evidence level: STRONG
IMPORTANT WARNING. Adrafinil can make your birth control pills less effective by speeding up how your liver processes the hormones. This could lead to unintended pregnancy. You may need a backup contraceptive method or a higher-dose formulation.
Adrafinil is converted to modafinil in the liver, which is a potent inducer of CYP3A4. Ethinyl estradiol and other contraceptive hormones are CYP3A4 substrates. CYP3A4 induction accelerates metabolism of contraceptive hormones, potentially reducing plasma levels below the threshold needed for reliable ovulation suppression. This effect can persist for weeks after discontinuation.
Use backup contraception (barrier methods like condoms) while taking adrafinil AND for at least 2 months after stopping. Discuss with your gynecologist — you may need a higher-dose contraceptive formulation or a non-hormonal method (copper IUD).
Take Combined Oral Contraceptives as prescribed. Adrafinil can typically be taken with a meal, spaced 1-2 hours from the medication for clean absorption. Discuss this combination with your pharmacist for personalized guidance.
Higher risk for: smokers over 35 (thromboembolism), those with liver disease, concurrent CYP3A4 inducers (may reduce contraceptive efficacy), history of blood clots, migraines with aura, or obesity.
Breakthrough bleeding or spotting may indicate reduced contraceptive hormone levels. This does not mean pregnancy has occurred, but suggests the contraceptive effect may be compromised.
Inform both your prescriber and gynecologist about adrafinil use. Discuss that adrafinil is a prodrug of modafinil (a known CYP3A4 inducer). Request guidance on contraceptive alternatives or dose adjustments.
Some substances can reduce contraceptive effectiveness. Use backup contraception if adding a known CYP3A4 inducer. Discuss with your gynecologist — IUDs and injections are not affected by enzyme-inducing interactions.
IMPORTANT WARNING. Adrafinil can make your birth control pills less effective by speeding up how your liver processes the hormones. This could lead to unintended pregnancy. You may need a backup contraceptive method or a higher-dose formulation.
Take Combined Oral Contraceptives as prescribed. Adrafinil can typically be taken with a meal, spaced 1-2 hours from the medication for clean absorption. Discuss this combination with your pharmacist for personalized guidance.
Breakthrough bleeding or spotting may indicate reduced contraceptive hormone levels. This does not mean pregnancy has occurred, but suggests the contraceptive effect may be compromised.
Some substances can reduce contraceptive effectiveness. Use backup contraception if adding a known CYP3A4 inducer. Discuss with your gynecologist — IUDs and injections are not affected by enzyme-inducing interactions.
Inform both your prescriber and gynecologist about adrafinil use. Discuss that adrafinil is a prodrug of modafinil (a known CYP3A4 inducer). Request guidance on contraceptive alternatives or dose adjustments.
Or browse the full interaction database (121,000+ pairs).