I was taking Benadryl unknowingly for over 1.5 years (over the counter generic so I didn't know its affects) for allergies and stopped in March of this year. I could't stay awake in class because I would take the pills right before heading to school.
I thought my body was going nuts, I was falling asleep in class all the time and it was very embarassing. Some teachers also took it personally. I tried exercising more, sleeping early (10pm on weekdays), drinking chocolate milk in the morning (sensitive to Caffiene) and stabbing myself repeatedly with pencils when falling asleep. Nothing worked and I messed up my academic record. Stupid self medication and stupid me for not consulting my doctor sooner (was busy as hell with work and schoolwork).