U.S. doctors online nowAsk doctors free
Springfield, MO
A 26-year-old male asked:

Is topamax (topiramate) an inhibitor or inducer or cyp2c19? weak or not, i'd still like to know. thank you kind doctors.

1 doctor answer2 doctors weighed in
Dr. Rawan Tarawneh
A Verified Doctoranswered
A US doctor answeredLearn more
Weak inhibitor: Topamax (topiramate) is a weak inhibitor of the cyp2c19 enzyme. This enzyme is responsible for the metabolism of several drugs including Phenytoin (dilantin). Therefore, the concomitant use of Dilantin and topamax (topiramate) may be associated with increased Dilantin levels. This is probably more evident with topamax (topiramate) doses that exceed 200 mg/day. I hope this helps!

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Educational text
Free
Talk to a doctor
24/7 visits - just $39!
50% off with $15/month membership

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Educational text
Free
Talk to a doctor
24/7 visits - just $39!
50% off with $15/month membership
Last updated May 3, 2015

Disclaimer:

Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.