I feel so drowsy even several hours after I wake up. What can I do?

Wirkip. If you snore, get sleep study. Get your thyroid checked through blood chemistries. Make sure youarenottaking stimulates such as coffee or tea and sugary goods after 3 pm. That would be a start.
Find out why. If you r drowsy hours after u have slept, there is a definite problem. Many possibilities: adverse drug effect, abnormal sleep state, sleep disordered breathing, thryoid, heart or nervous system disorder...Probably the most common cause is depression. See a good primary care physician (if he says you r depressed without work-up, find another). Eat four times per day, drink more than 60 oz water.