Talk to your healthcare provider before combining certain medications with Ortho-Novum. Drug interactions may occur if it is taken with antibiotics, several seizure medications, and certain barbiturates. Some of these interactions can decrease the effectiveness of Ortho-Novum, possibly increasing the risk of pregnancy. If you are unsure about any particular Ortho-Novum drug interaction, use a backup method of contraception until you can talk to your healthcare provider.
Ortho-Novum® can potentially interact with numerous other medicines. Many of these interactions can be severe enough to cause accidental pregnancy, and a backup method of birth control may be recommended.
Many medications interact with Ortho-Novum, so it is a good idea to make sure that all of your healthcare providers know you are taking Ortho-Novum. Anytime you start a new medication, check with your healthcare provider about possible drug interactions with Ortho-Novum. Some of the medicines that may lead to interactions include: