anxiety
"I took 2 25mg pills last night.  Woke up today with bad headache and dry mouth. I had some bizarre dreams on the stuff and felt a bit of an antihistamine hangover.  A few convulsions in my sleep.  I think next time I will try 12.5 mg's.  I have a tolerance to everything except antihistamines for some reason.  I did not care for the crappy side effects I experienced upon waking up the next day.  Dehydrated, sluggish, dizzy, depressed, dry mouth"