Background: Father with various heart problems (blockages, attacks) over 20 years. He was in car accident recently, very banged up, had heart another attack after accident. Was released to go home, with new meds, including coreg and lasix -- now complains of extreme fatigue and muscle pain in his legs. Is there any way to tell if that s just pain from the accident bruising or if he s having side effects to the lasix? When he came home a few days ago he (slowly carefully) walked up 2 flights of stairs to reach his apartment. Since then he s been getting progressively weaker, but his bp is 137/69 so I don t think that s the problem. Worried about muscle pain/fatigue being side effect to the meds.