insomnia
"I have to weigh in about this med.  When you first start it, it is a wonder drug.  At some point, you will either need more, or you will suffer from tolerance withdrawals.  There are justifiable horror stories about this drug. Taking it for a week or two, no problem.  More than 2 weeks, it's hard to get off it.  I have been weaning off for about 4 months."