Suggest A Multivitamin Pill That Can Be Taken While On Gabapentin

i am on gabapentin and wellbutrin i am a personal trainer and in good physical shape however i want to find a multivitamin that is good and will not effect my meds and also how much vitamin c should i be taking i am in a rehab and do not want to jeopardize my sobriety i was told to get multi vitamins from Dr. weil and / or dr schultz but do not know if there vitamins will do me the most good