SPL Set ID: 8c273efa-62ec-16b2-e053-2995a90ac41d

Doxycycline Hyclate Capsules, USP, are an antibacterial drug synthetically derived from oxytetracycline. The structural formula of doxycycline monohydrate is: [structural formula of doxycycline monohydrate] with a molecular formula of C22H24N2O8•H2O and a molecular weight of 462.46. The chemical designation for doxycycline is 4­ (Dimethylamino)­1,4,4a,5,5a,6,11,12a­octahydro­3,5,10,12,12a­pentahydroxy­6­methyl­1,11­dioxo­2­naphthacenecarboxamide monohydrate. The molecular formula for doxycycline hydrochloride hemiethanolate hemihydrate is (C22H24N2O8•HCl)2•C2H6O•H2O and the molecular weight is 1025.89. Doxycycline is a light yellow crystalline powder. Doxycycline hyclate is soluble in water, while doxycycline monohydrate is very slightly soluble in water. Doxycycline has a high degree of lipoid solubility and a low affinity for calcium binding. It is highly stable in normal human serum. Doxycycline will not degrade into an epianhydro form. Each capsule for oral administration contains doxycycline hyclate equivalent to 100 mg of doxycycline (anhydrous). Inactive ingredients: lactose monohydrate, microcrystalline cellulose, magnesium stearate. The 100 mg capsule shell contains: gelatin, diacetylated monoglycerides, sucrose fatty acid esters, glacial acetic acid, sodium lauryl sulfate, colloidal silicon dioxide, FD&C Blue #1 and titanium dioxide. The printing ink may contain: Shellac Glaze, Iron Oxide Black, N­Butyl Alcohol, Propylene Glycol, SDA 3A Alcohol, FD&C Blue #2, FD&C Red #40, FD&C Blue #1, D&C Yellow #10.