There have been some historians that tell us how many of the people that Hitler surrounded himself were those who used methamphetamine.There have also been reports of how the Kamikaze pilots of Japan used the stuff so they could carry out many of their suicidal missions without fear.So that tells us a little something about the drug.It tell's us that it has the ability, depending on the potency and the amount taken, to dull and/or entirely numb a person's conscious to where they can proceed to do or try things while under its influence that they otherwise wouldn't even think about doing or trying in their normal state...despite how evil or immoral, without worrying how it may affect others including their loved ones.
Depending upon the individual and the potency of the particular batch that they got their hands on, methamphetamine can be the means by which a person can escape from reality and that escape can last quite a long time if they have enough of it and they keep hitting or smoking it every so often.( there are those who claim to be able to function well enough to go to work etc, but your husband sounds more like the way that I was and I can honestly tell you that I definitely wasn't functional).
If your husband can't quit on his own, which could prove to be difficult if it's his second time around, then the best way, if it's financially feasible, would be an inpatient program.However, NA or AA are extremely good programs also, even if it's just to show up and listen each time, because the people who attend have the same goal.....to get off and stay off whatever drug it is that's destroying their health, relationships, career, dreams etc.
It's not the withdrawals that are so bad because compared to many different types of drugs the withdrawals aren't very severe.The detoxification process can take up to around two weeks.There is however usually quite a bit of depression and guilt etc.to deal with and the intense craving to escape one more time.
Another thing that I found to be really helpful along with regular meetings as far as dealing with the depression and the craving (and that depression can be intense) is watching Joel Osteen via television or YouTube.He seems to have a real gift as far as being able to encourage people that might be "going through it". I hope this helps.