"i was prescribed this medicine for sleep-maintenance insomnia. when i first started taking it, i found that 15mg wasn&#039;t enough since i had bad anxiety related to the stress of not being able to sleep and i still woke up for long periods. i took 30 mg, which was effective but i felt dopey during the day and had a headache for a few hours when i woke up. after taking it for 2 weeks, i now can take 15 mg and get a pretty good sleep with no side effects."