Take the full course -- meaning, use all the pills or creams as prescribed, even if your symptoms go away before you run out of the medicine. Keep in mind that vaginal creams, vaginal tablets, and suppositories contain oil, which can damage condoms and diaphragms. So you’ll need to use another birth control method or not have sex during treatment, if you don’t want to get pregnant. Never take any medication --- or even use a nonprescription vaginal cream --- while pregnant without first talking to your doctor.