Ipriflavone (INN, JAN; brand name Yambolap) is a synthetic isoflavone which may be used to inhibit bone resorption,[2] maintain bone density and to prevent osteoporosis in postmenopausal women.

It slows down the action of the osteoclasts (bone-eroding cells), possibly allowing the osteoblasts (bone-building cells) to build up bone mass.

A clinical trial reported in 2001 that it was not effective in prevention or treatment of osteoporosis.

[3] A double-blind study reveals that ipriflavone might be effective on reducing tinnitus on otosclerosis sufferers.

[6][7] The drug prevents bone loss via mechanisms that are distinct from those of estrogens.