Synthroid leg pain. . What should I avoid while taking Synthroid?Consumer ratings reports for SYNTHROID . Includes patient rankings on scale of 1-5 . . . dizzy nausea aching legs mood problems . . Tell your doctor if you experience rapid or irregular heartbeat, chest pain, shortness of breath, leg . . . . . . . I wrote about the terrible muscle pains I was getting from taking Synthroid. me on 25 mcg of synthroid as i was diagnosed with subclinical hypothyroidism. . . . . Information on leg pai... more