Premarin consists of conjugated estrogens, specifically a combination of sodium estrone sulfate and sodium equilin sulfate. Additionally, it contains other elements like sodium sulfate conjugates, 17 α-dihydroequilin, 17 α-estradiol, and 17 β-dihydroequilin.
There are some inactive ingredients present in it like calcium phosphate tribasic, hydroxypropyl cellulose, microcrystalline cellulose, powdered cellulose, hypromellose, lactose monohydrate, magnesium stearate, polyethylene glycol, sucrose and titanium dioxide.