I have read on these boards that if an MLC is interrupted, and my WH's was, as he was deployed to Iraq for 18 months, that it can come back with a vengence. Also, he has the added PTSD from Iraq and Alcohol. I have also read from Snodderly, that MLC'rs tend to cycle about every 8-10 years. I don't think that means they all go diving back off the deep end, just that they might have a bout of depression, etc.
My husband is 48 but looks 58. His hair is entirely gray, his face is wrinkled. He has an 'alcoholic nose'. He has had more surgeries than I can remember at this moment, including having a rod put into his back due to an injury in Iraq. He is desperately seeking to hang on to his youth and vitality. We were happy grandparents looking forward to retirement, and then he just 'flipped'