http://www.medications.com/effect/view/4486 I am 63 and taking 10 mg of Monopril for mild high blood pressure / under complete control. Just put on Lipitor 20 two weeks ago and for two night straight I had muscle cramps. Hamstrings (both legs), and upper legs the next night. Cramps lasted about 5 Tue, 04 Sep 2007 13:44:23 -0400 http://www.medications.com/effect/view/4486?item=1571 if you are still having side effects to Lipitor, coq-10 can help. Available at super markets, health food stores etc... but cheapest on-line. I was told 300mg a day but had to go up to 900 mg a day and the symptoms started to lesson in 3 days and were GONE http://www.medications.com/effect/view/4486?item=1571