Will there be any bad effect if i drink often drink black tea? i drink sabah tea.

Narcolepsy?: At your young age with no heart, disease, probably not, but you will be urinating more frequently since it has diuretic properties. If you drink a lot, you can also have a withdrawal syndrome with headaches that is unpleasant. Is there a reason for the drowsiness? Are you going to sleep early enough to get 7-9 hours? Try not to use any electronic equipment before bed. Light keeps you awake.