I was about to post about having this problem then SWIM UTFSE, and presto! Bump please..
I find myself constantly falling asleep, due to opiate use(i believe), but ONLY WHEN DRIVING. I started taking Nuvigil, which seems to help some. It's totally weird, cause when I arrive at my destination, I am wide awake. I am awake before I drive somewhere. At first I thought it was a freak coincidence, but it has gotten worse the longer I have used. I didn't notice it at all for the first year I used...
I personally think it has something to do with the faster motion -- all my driving is highway driving. When I am driving at slower speeds, I don't notice getting sleepy. When I am blasting down the highway at 80mph, I start to get the head creeps..As you can imagine, this is super dangerous, and totally crippling if you don't drive at all as a result of this...then again it could be totally crippling if you smash into a wall or another car at 80+ mph...
Ever since it happened, I have had to pull over and get out and walk around. It freaks me out, the last thing I want to do is hurt anyone. My solution, make sure and have a cold drink with me (coke, red bull, water), and something to chew ( a mint, or tic tac, or something). It does seem to help some, and is probably cheaper than that electrical device that was spammed a few posts ago.
If anyone has any other insight, medical or otherwise, or solutions to this problem, I would love to hear..this is very interesting to me.
jt
