Losartan
"Given this generic medication for hypertension.  My B/P was good during the day. I am 59  I have been on it 7 days now and since starting it my heart sometimes feels like it has a "thump" in the middle of my chest.  Without fail my B/P goes up at night around 10-11 pm and I find it very hard to sleep for being afraid I will have a heart attack during the night.  Take losartan 25 mg pill around 8 pm , I will wake up around 1 am with my B/P up to 150-160/90-95 and my heart pounding! I was once on Benicar and was terribly dizzy every single day ---don't know if I will be able to continue losartan but more fearful of the other BP meds like beta blockers!  Very scared!"