My dad (who is 70) is on Lipitor for his cholesterol. He takes 10 mg per day. The problem is, in his sleep, he yells and screams and thrashes around. My poor mom is getting no sleep obviously! Has anyone else heard of this problem with Lipitor? I've read about problems with insomnia, but nothing like this. BTW, he is also on Prinivil (10 mg BID), which is a blood pressure drug. He doesn't have high BP, but he does have an overactive left ventricle, and a side effect of this drug is that it regulates the ventricles. Couldn't find anything about sleep disorders of this nature with this one either. Of course, it's not like any "official" pubs tell you the truth. That's why I'm here! Hope somebody can help. Thanks.