Question about Tegretol and Finasteride drug interaction?

It is best to discuss medication changes with your doctor.  The Internet is not the place to obtain personal medication advice.  

Speak to your neurologist and family physician  to determine their views on your specific situation. In general though, carbamazepine (Tegretol) is a CYP 3A4 inducer and finasteride a substrate. Overall, though the literature supports the notion that drug interactions of clinical importance have been not been identified. Both drugs are common and I've never had issues with these two medications used together. Remember though as a person comes off finasteride, they will likely lose hair (if the finasteride was helping to stop hair loss). Within 6-9 months, many experience a new baseline of (reduced) hair density.