SPL Set ID: fe08aebb-b390-d176-e053-6394a90a6be7

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 a white to light brown crystalline powder. It is soluble in dilute hydrochloric acid, and practically insoluble in methanol, glacial acetic acid, ethanol, acetone, ether and chloroform. 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, corn starch, pregelatinized starch, and magnesium stearate. The capsule shell is printed with black ink. The black inks contain shellac, ethanol, isopropyl alcohol, n-butyl alcohol, propylene glycol, ammonia solution, iron oxide black and 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, black and yellow iron oxide; 300 mg – gelatin, titanium dioxide, FD&C Blue No. 1and D&C Yellow No. 10. Droxidopa capsules differ in size and color by strength [see Dosage Forms and Strengths ( 3 )] . Droxidopa-01