Amlodipine
"I took this medicine for about two weeks for high blood pressure.  I took the dose of 10 mg at night.  Halfway through the night (about 2-3 a.m.) I would wake up with an extremely dry mouth and lips.  After three days, I took the medicine in the morning.  However, the extremely dry mouth, swollen tongue and lips and the feeling that my throat was closing drove me to the doctor who immediately gave me Benadryl and told me to stop this medicine for one week.  I am now in that one-week waiting period and will try another blood pressure medicine (Cozaar).  However, please note that the side effects were cumulatiive--I did not recognize them immediately.  "