My Son Is An Addict And Has Experienced Periods Of

My son is an addict and has experienced periods of time even years when he has been drug free. He relapsed and was taking xanax & other drugs he could get his hands on. He entered a detox center on 4/4/2018 and was released on 4/14/2018. Have questions regarding a medication they prescribed for him while he was in detox & upon his release. Also would like a name of a physician and accredited counselor in the Leesburg, FL area who knows and can treat drug addictions. He has been successful and free of drugs when he diligently works a 12 Step program such as Narcotic Anonymous.