Dr. Rassman,
I am a 22 year old male who just started on Propecia. I am currently taking Lamictal and Lithium for anxiety, do you think these drugs could interfere with the effectiveness of propecia?
You should always check with your prescribing doctor or pharmacist if you have questions about any medications interacting, but the probable answer is no.
For what it’s worth, Drugs.com shows no known interactions in their database: