How will i feel when i start taking synthroid. . . . . . Consistent therapy and . . I don't feel many changes since taking the synthroid, perhaps looser bowels and this joint . . . [Archive] taking synthroid and still feeling bad Thyroid Disorders . . Even if you feel well . . Do not start a new medication without telling your doctor. Do not stop taking this medication suddenly. Is it true that I can't stop taking the synthroid now, to see if the joint stiffness goes away? I don't feel many . ... more