http://www.medications.com/effect/view/33255 have been on diovan for about 3 years. taking 80 mg. twice a day. have gained weight. then in oct. 2007, my doctor upped my dose to an extra 40 mg. i had noticed side effects when i first started the diovan, such as back pain, dizziness, weight gain, diarrh Thu, 14 Aug 2008 14:27:23 -0400 http://www.medications.com/effect/view/33255?item=11129 I have been taking Diovan for approx. 18 months and also have muscle weakness and very tired . Sometimes I can hardley walk. When I read your letter it sounded like me. I think I will try and not take any and see what my legs feel like. http://www.medications.com/effect/view/33255?item=11129