insomnia
"I took the only melatonin in my house at the time which was 5mg. Since school had started I found it really hard to go to bed before 10 and I would just lay in bed waiting. I took this and it really helped me fall asleep but I've been REALLY sleepy ever since. I took it 2 nights ago and I'm still sleepy and its really annoying. I think 5 mg is way too much. I'll only ever take small doses"