Premarin is a medication available in strengths of 0.3 mg and 0.625 mg, containing conjugated estrogens as its active ingredient. It is predominantly used by women to alleviate menopause symptoms such as vaginal dryness and hot flashes. Manufactured by reputable companies, Premarin is also marketed under alternative brand names like Progynova, Estrabet, Evadiol, and Endofert.