Hey mamanan, this happens to me all the time now. I was DX'd in March of 2011, and started on Cymbalta 30mg daily. Rather than move from 30mg to 60mg after 2 weeks, I opted to stay at 30mg, and use Tylenol / Advil (Anaprox now), so that I didn't have any more of the nasty symptoms of the drug than I needed. Isn't funny how taking some of these meds. makes you feel almost worse at first? It's like those commercials that give you 101 symptoms that taking the drug can cause, and you think... so why am I taking this? Then you have a really bad day of pain/fatigue and you think... well it can't be any worse than this... but I digress.
Yes, falling asleep at the wheel... this really became a problem this summer for me. We go to the cottage every weekend, and often I would volunteer to drive back on Sunday (my husband drove on Friday nights, so I though I'd share the driving). Numerous time when we'd get on the highway, or on the 2 lane roads, I'd start to get the droopy eyes, then my foot would start to either pull of the gas... or worse push on it. I'd try rolling down the window, turing on the AC full blast, turning up the radio, and even smacking myself in the cheek to shock myself into being fully awake. I ended up just pulling over, getting a coffee, and in some cases asking my husband to take over for fear I'd drive us (and my 3 year old in the back seat) off the road. What's funny is that it only started this summer, and seems to happen mainly on the highway... maybe the menontenous skyline and horizon.
I should mention that I've recently found out that I may have pernious anemia (waiting on blood test results), which stems from a chronic malabsorbtion problem with vitamin B12... my level is 130... less than 200 is considered chronic deficency. I'm hoping to start B12 injections soon... but all this with the sleepiness at the wheel started about the same time that my B12 was identified as being chrically low... so that could also be contributing to the fatiuge.
In any case... my adivce is let your hubby do the driving as much as possible... and if not... the snacks and coffee might be a good option... at least it will be keeping your hands and mouth busy, so you might have less chance of jsut sitting at the wheel and getting sleepy.