Hello doctor I am a 27 year old boy I have an addiction for the last 10 years it's like alcohol addiction. I was taking naltrexone 50 mg the good effects of this medicine was so effective but I had to discontinue this naltrexone due to its major side effects, like unable to speak freely, hand shaking and so on I want to take some medicine which can give me the same effects as naltrexone. I have tried so many medicines but naltrexone was fabulous but side effects were so bad. I just want a substitute.