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More Medicines That Interfere With Etonogestrel/Ethinyl Estradiol Vaginal Ring

Griseofulvin (Grifulvin)
Griseofulvin may make etonogestrel/ethinyl estradiol vaginal ring less effective, increasing your risk of pregnancy. Talk with your healthcare provider, as you may need to use a backup method of contraception.
 
Modafinil (Provigil)
Modafinil may make etonogestrel/ethinyl estradiol vaginal ring less effective, increasing your risk of pregnancy. Talk with your healthcare provider, as you may need to use a backup method of contraception.
 
Nafcillin (Nallpen, Unipen)
Nafcillin may cause your body to metabolize the hormones in etonogestrel/ethinyl estradiol vaginal ring too quickly, increasing your risk of pregnancy. Ask your healthcare provider if you should use a backup method of contraception.
 
Protease Inhibitors
Using etonogestrel/ethinyl estradiol vaginal ring together with a protease inhibitor may increase your risk of pregnancy or side effects. Talk with your healthcare provider before using etonogestrel/ethinyl estradiol vaginal ring with a protease inhibitor.
 
Rifamycin Antibiotics
Rifamycin antibiotics may make etonogestrel/ethinyl estradiol vaginal ring less effective, increasing your risk of pregnancy. Talk with your healthcare provider before taking these medications together, as you may need to use an alternate form of birth control.
 
Selegiline (Eldepryl, Emsam, Zelapar)
The hormones in etonogestrel/ethinyl estradiol vaginal ring may increase the level of selegiline in your blood, increasing your risk of side effects. Your healthcare provider may need to lower your selegiline dosage or may recommend an alternate form of contraception.
 
St. Johns Wort
St. Johns wort (a commonly used herbal supplement) may decrease the effectiveness of etonogestrel/ethinyl estradiol vaginal ring, increasing the chance of pregnancy. In general, you should not take St. Johns wort while using etonogestrel/ethinyl estradiol vaginal ring.
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