Risofos (Generic Risedronate Sodium Tablets) is a bisphosphonate and is used to prevent and treat osteoporosis (thinning of the bone) in women after menopause. Risedronate tablets may also be used to increase bone mass in men who have osteoporosis, and in men and women to prevent and treat osteoporosis caused by long-term use of corticosteroids (cortisone-like medicine). Risedronate tablets are also used to treat Paget's disease of the bone.