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More Medicines That Interfere With Oral Contraceptives

Modafinil (Provigil)
Modafinil may make oral contraceptives less effective, perhaps increasing your risk of pregnancy. Talk with your healthcare provider, as you may need to use a backup method of contraception.
 
Protease Inhibitors
Using oral contraceptives with a protease inhibitor may increase your risk of pregnancy and may make the protease inhibitor less effective. Talk with your healthcare provider before using oral contraceptives with a protease inhibitor.
 
St. John's Wort
St. John's wort, a commonly used herbal supplement, may decrease the effectiveness of oral contraceptives, possibly increasing the chance of pregnancy. In general, you should not take St. John's wort while using oral contraceptives.
 

Final Thoughts

It is possible that not every drug interaction was discussed in this article. Therefore, you should talk with your pharmacist or healthcare provider about the specific interactions that may apply to you.
 
Since many women get oral contraceptives from a source other than their pharmacies, such as a women's health clinic, make sure your pharmacist knows that you take oral contraceptives. Your pharmacist will not check for drug interactions if he or she does not know that you are taking oral contraceptives.
 
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Oral Contraceptives Information

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