SPL Set ID: f6dce609-c7d7-48a3-83bb-32ecf00f973f

Droxidopa capsules contain droxidopa, which is a synthetic amino acid precursor of norepinephrine, for oral administration. Chemically, droxidopa is (–)-threo-3-(3,4-Dihydroxyphenyl)-L-serine. It has the following structural formula: Droxidopa is an odorless, tasteless, white to light brown color powder. It is slightly soluble in water, and practically insoluble in methanol, glacial acetic acid, ethanol, acetone, ether, and chloroform. It is soluble in dilute hydrochloric acid. It has a molecular weight of 213.19 and a molecular formula of C 9 H 11 NO 5 . Droxidopa capsules also contain the following inactive ingredients: mannitol, pregelatinised starch (corn starch), and magnesium stearate. The capsule shell is printed with black ink. The black inks contain shellac, propylene glycol, black iron oxide, potassium hydroxide. The capsule shell contains the following inactive ingredients: 100 mg – gelatin, titanium dioxide, FD&C Blue No. 2, black and red iron oxide; 200 mg – gelatin, titanium dioxide, FD&C Blue No. 2, black and yellow iron oxide; 300 mg – gelatin, titanium dioxide, FD&C Blue No. 2, yellow iron oxide. Droxidopa capsules differ in size and color by strength [see Dosage Forms and Strengths ( 3 )] . droxi01