Is dad's back pain from heart failure medication?

We've never seen back pain due to a diuretic, so it's unlikely that your father's pain is linked to that medication. Patients often attribute new symptoms to their medications, but there are actually many causes for back pain, some of which can be serious. Your father needs to be evaluated by his doctor.

i have found that my heart meds can cause back pain and joint pain. i expermited by lowing the doseage and the pain went away, then back to perscribed dose, and it came back. i tried again with the same results. tom

Please check with your pharmacist. Tell him him or her the meds that dad has been prescribed since being diagnosed with CHF. As a general rule, pharmacists keep up with the side effects of meds better than doctors. I'm not knocking doctors, but drugs are a pharmacists job and they are more knowledgeable about side effects than doctors. Think of it this way; the docs have all they can do and then some just keeping up with the latest in diseases and symptoms. Pharmacists job is meds and they go to classes constantly to keep up with the drugs etc. All the best, and thanks for being a caring son/daughter!