Tamoxifen IDM 10 mg. 20mg. Tablets Each Tablet contains: 15.2 mg of tamoxifen citrate which is equivalent to 10 mg tamoxifen for Tamoxifen 10 IDM or 30.4 mg tamoxifen citrate equivalent to tamoxifen 20 mg tamoxifen for Tamoxifen 20 IDM. » (SERM) FDA Approved for ovulation induction.