Use of doxycycline might increase the incidence of vaginal yeast infections. To prevent a vaginal yeast infection, consider eating yogurt with live cultures (e.g., acidophilus) or douching with plain yogurt with live cultures or taking oral acidophilus tablets or probiotic suppositories while taking doxycycline.
Use of doxycycline may reduce the effectiveness of oral contraceptive pills, according to the FDA. Use a backup form of pregnancy prevention while on doxycycline. We recommend that you always use condoms to reduce your risk of sexually transmitted infections.
