Drug Interaction Report

PHENobarbital may decrease the blood levels and effects of medroxyPROGESTERone. You may need a dose adjustment if you have been taking medroxyPROGESTERone and are starting treatment with PHENobarbital. Contact your doctor if your condition changes during treatment with these medications. The interaction is not expected to occur if you are getting medroxyPROGESTERone by shot for birth control. However, let your doctor know if you experience bleeding outside of your menstrual cycle, since it may indicate reduced effectiveness of medroxyPROGESTERone. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Ask your doctor before using PHENobarbital together with ethanol (alcohol), this can add to dizziness, drowsiness and other side effects of PHENobarbital. Be careful if you drive or do activities that require you to be awake and alert. Talk with your doctor before using any medications together, or drinking alcohol with PHENobarbital. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.