One of the side effects is drowsiness/sleepiness. I tried it for 2 weeks and didn't like it. Made me too sleepy and weird feeling. I have had dizziness/imbalance/anxiety for almost 4 years. I need something to make me feel good, not crappy. I have been feelign crappy for 3.5 years. I am not a "drug" person and avoid taking most things. Tried xanax and didn't like that either. Can't win. I jhave no diagnosis and wonder what the hell is casuing dizziness. docs really don't know. Have had every test imaginable. they mention migraine. good luck.