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(ospemifene) Tablets, for Oral Use
WARNING: ENDOMETRIAL CANCER AND CARDIOVASCULAR DISORDERS
See full prescribing information for complete boxed warning. OSPHENA is an estrogen agonist/antagonist with tissue selective effects. In the endometrium, OSPHENA has estrogen agonistic effects. There is an increased risk of endometrial cancer in a woman with a uterus who uses unopposed estrogens. Adding a progestin to estrogen therapy reduces the risk of endometrial hyperplasia, which may be a precursor to endometrial cancer [see WARNINGS AND PRECAUTIONS]. Estrogen-alone therapy has an increased risk of stroke and deep vein thrombosis (DVT). OSPHENA 60 mg had cerebral thromboembolic and hemorrhagic stroke incidence rates of 0.72 and 1.45 per thousand women, respectively vs. 1.04 and 0 per thousand women, respectively in placebo. For deep vein thrombosis, the incidence rate for OSPHENA 60 mg is 1.45 per thousand women vs. 1.04 per thousand women in placebo [see WARNINGS AND PRECAUTIONS]
Figure 1: Chemical structure
The chemical designation is Z-2-[4-(4-chloro-1,2-diphenylbut-1-enyl)phenoxy]ethanol, and has the empirical formula C24H23ClO2, which corresponds to a molecular weight of 378.9. Ospemifene is a white to off-white crystalline powder that is insoluble in water and soluble in ethanol.
Each OSPHENA tablet contains 60 mg of ospemifene. Inactive ingredients include colloidal silicon dioxide, hypromellose, lactose monohydrate, magnesium stearate, mannitol, microcrystalline cellulose, polyethylene glycol, povidone, pregelatinized starch, sodium starch glycolate, titanium dioxide, and triacetin.
Last reviewed on RxList: 3/13/2015
This monograph has been modified to include the generic and brand name in many instances.
Additional Osphena Information
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