http://www.medications.com/effect/view/31214 HELLO; I'M A 57 YEAR OLD MAN THAT HAS OVER THE PAST YEAR WENT FROM A 20mg TABLET OF LISINOPRIL TO A 40mg TABLET 2 MONTHS AGO. I ALSO TAKE 100mg OF ATENOLOL WHICH HAS DONE A NICE JOB. THE 20mg LISINOPRIL JUST MADE ME VERY TIRED ALL DAY AND OCCASIONAL CRAMPIN