Prometrium (progesterone, USP) Capsules contain micronized progesterone for oral administration. Progesterone has a molecular weight of 314.47 and a molecular formula of C 21 H 30 O 2. Pictures of Prometrium (Progesterone), drug imprint information, side effects for the patient. Find patient medical information for Prometrium Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings. Not listed in your “Drugs That Can Cause Hair Loss” are medications that treat Bipolar Disorder. Lithium is the predominately used drug for this disorder. DESCRIPTION. PROMETRIUM (progesterone, USP) Capsules contain micronized progesterone for oral administration. Progesterone has a molecular weight of 314.47 and a molecular formula of C 21 H 30 O 2. Detailed drug Information for Prometrium. Includes common brand names, drug descriptions, warnings, side effects and dosing information. Using natural progesterone cream can help to balance estrogen levels in your body and reduce symptoms of estrogen dominance. Learn how to use it safely. Q: My wife is 50 years old and has been into menopause for the last two years. Since then she has been plagued with frequent uti's, 10 so far in the last twelve months. Progesterone, sold under the brand name Prometrium, is used to treat overgrowth of the lining of the uterus. It's also prescribed to treat amenorrhea (a lack of menstrual periods) caused by stress. Unlike hot flashes, night sweats and mood swings, dizziness and vertigo are two symptoms of perimenopause which are not discussed very often, although many women, myself included, suffer horribly with it.