drospirenone and estetrol - Generic Medications

NEXTSTELLIS ® (drospirenone and estetrol tablets) is an oral contraceptive. It is supplied in a transparent PVC/aluminum blister card containing 28 tablets: 24 pink active tablets contain 3 mg drospirenone and 14.2 mg of estetrol on the anhydrous basis. Drospirenone is a synthetic progestin and estetrol is a synthetic estrogen. 4 white inert tablets. The chemical name for estetrol is estra-1,3,5(10)-triene-3,15α,16α,17α-tetrol monohydrate. It has a molecular formula of C 18 H 24 O 4 ∙H 2 O and a molecular weight of 322.4 g/mol, equivalent to 304.4 g/mol (anhydrous). Estetrol has the following chemical structure: Estetrol (monohydrate) is a white to off-white crystalline solid that is poorly soluble in water and aqueous solutions. It is soluble in methanol, ethanol, sparingly soluble in acetone, and slightly soluble in ethyl acetate and acetonitrile. Drospirenone is chemically described as (6R,7R,8R,9S,10R,13S,14S,15S,16S,17S)-1,3',4',6,6a,7,8,9,10,11,12,13,14,15,15a,16-hexadecahydro10,13-dimethylspiro-[17H-dicyclopropa-[6,7:15,16]cyclopenta[a]phenanthrene-17,2'(5H)-furan]-3,5'(2H)-dione). It has a molecular weight of 366.5 g/mol, a molecular formula of C 24 H 30 O 3 , and the structural formula below: Drospirenone is a white to almost white or slightly yellow crystalline powder. It is a neutral molecule with slight solubility in water. The active tablet is a 6 mm, round pink film-coated tablet which contains 3 mg of drospirenone and 15 mg of estetrol as the monohydrate, equivalent to 14.2 mg of estetrol on the anhydrous basis, and the following inactive ingredients: corn starch, lactose monohydrate, magnesium stearate, povidone, and sodium starch glycolate. Each tablet is embossed on one side with a drop-shaped logo. The pink film-coating has the following inactive ingredients: hydrogenated cottonseed oil, hydroxypropyl cellulose, hypromellose, iron oxide red, talc, and titanium dioxide. The inert tablet is a 6 mm, round white film-coated tablet which contains the inactive ingredients corn starch, lactose monohydrate, and magnesium stearate. Each tablet is embossed on one side with a drop-shaped logo. The film-coating has the following inactive ingredients: hydrogenated cottonseed oil, hydroxypropyl cellulose, hypromellose, talc, and titanium dioxide. Chemical Structure Chemical Structure