Its not that he never really got over it. Its that he never learned how to deal with it.
By the way, sleep apnea will make ADHD worse (at least in kids), see the following link.
And the sleep apnea would certainly cause him to have trouble staying awake.
Essentially (to me) he is showing many classic ADHD and sleep apnea symptoms. The fortunate thing is that these can be treated by a good doctor who specializes in these areas.
I am a bit more concerned with your statement that he,"he is not attenative to much of anything and does not care to help out with anything." That sounds like depression might be setting in. According to the book, "The ADD/ ADHD Answer book," by Susan Ashley, that can be pretty common.
I am guessing that he went off Ritlin about the time he went out into the work force. Back then, they really didn't have much knowledge about adults with ADHD. Heck, it really wasn't until the late 70's that we began to hear much about it in the public schools. In fact, I am impressed he was diagnosed way back then!
Point being, there are a lot of adults now with ADHD and the medical profession is better equipped to deal with them. Many posters on this site are on an as needed basis with meds, or on a low dose during the time of the day that it is needed. If you can afford it, I would look for a psychiatrist for help.
I have not found a lot of sites with information for adults. But two you might want to check out are:
and check out their other links on the bottom of the page.
I hope some of this helps. I am also afraid that you might have to carry the load so to speak if he is depressed. That makes it hard to get motivated. Best Wishes!!