Having epilepsy is not a usually contraindication to a hair transplant, provided it is controlled.There are however some medications for epilepsy which could pose a problem. Be sure to meet with your surgeon and review all your medications.
If your epilepsy is under control, you are a candidate for hair transplant. We usually ask for a clearance letter from your general doctor to make sure that the medications we use do not interfere with the ones you are currently taking.