More Medicines That Interfere With Heather
Modafinil can make Heather less effective, increasing your risk of pregnancy. Talk with your healthcare provider, as you may need to use a backup method of contraception.
Numerous Seizure Medications
Some seizure medications may cause your body to metabolize the hormones in Heather too quickly, increasing your risk of pregnancy. Ask your healthcare provider if you should use a different method of contraception while taking a seizure medication.
St. John's Wort
St. John's wort (a commonly used herbal supplement) may decrease the effectiveness of Heather, increasing the chance of pregnancy. In general, you should not take St. John's wort while using Heather.