I'd be alright, for the first half of the lecture, then I find myself dozing off for a while before being awake again causing me to miss some material.
I get at least 7hrs of sleep every night. I don't drink coffee but I do drink tea. I'm afraid if I start drinking coffee, I'm going to be dependent on the caffeine.
I'm seriously considering putting in earbuds and playing binaural beats as background music to the lecture but I'm afraid that my professor will think that I'm not paying attention.
This always happens during the winter time when classes are too warm!!