Thanks Katie!! Was looking for something new read... May as well read something healthy for once :)
If anyone else is interested, the book is available on Amazon for Kindle or as a paperback.
Beta-Alanine is supposed to help with negative withdrawal symptoms. But at this point, it is better to go to a hospital if this is an option. Pregabalin, gabapentin also helpful, but if he is showing addictive behaviour a long term solution cant be another drug.
Also, if really interested in helping (which I see you are) maybe have a look at the origins of addiction and how to overcome that
https://www.amazon.com/Abstinence-Myth-Approach-Overcoming-Addiction-ebook/dp/B07FK4BQ4X/ref=sr_1_1?ie=UTF8&qid=1535913925&sr=8-1&keywords=the+abstinence+myth#customerReviews Guy has a podcast too, google him.