SPL Set ID: 3e7cf78f-3b48-4614-9fa4-c6d1e0c05a35

Doxycycline is an antibacterial drug synthetically derived from oxytetracycline, and is available as Doxycycline Hyclate Tablets and Capsules and Doxycycline for Oral Suspension; for oral administration. The structural formula of doxycycline monohydrate is with a molecular formula of C 22 H 24 N 2 O 8 ∙H 2 O and a molecular weight of 462.46. The chemical designation for doxycycline is 4-(Dimethylamino)-1,4,4a,5,5a,6,11,12a-octahydro-3,5,10,12,12a-pentahydroxy-6-methyl-1,11-dioxo-2-naphthacenecarboxamide monohydrate. The molecular formula for doxycycline hydrochloride hemiethanolate hemihydrate is (C 22 H 24 N 2 O 8 ∙HCl) 2 ∙C 2 H 6 O∙H 2 O 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. Inactive ingredients in the capsule formulations are: colloidal silicon dioxide, lactose anhydrous, magnesium stearate, methylcellulose, microcrystalline cellulose, polyethylene glycol, sodium starch glycolate, and stearic acid. 50 mg gelatin capsule shell contains: FD&C Blue #1, D&C Yellow #10, titanium dioxide and gelatin. 100 mg gelatin capsule shell contains: FD&C Blue #1, titanium dioxide and gelatin. Black ink contains shellac glaze in SD-45, black iron oxide, propylene glycol, FD&C Blue #2, FD&C Red # 40, FD&C Blue # 1, D&C Yellow # 10, butyl alcohol, denatured alcohol. Each capsule, for oral administration, contains doxycycline hyclate equivalent to 50 mg or 100 mg of doxycycline. Inactive ingredients for the oral suspension formulation are: confectioner's sugar, D&C red #27 aluminum lake, methylparaben, microcrystalline cellulose/ sodium carboxymethylcellulose, natural raspberry flavor; propylparaben, simethicone and sucrose. When reconstituted, each teaspoonful (5 mL) doxycycline suspension, for oral administration, contains doxycycline monohydrate equivalent to 25 mg of doxycycline. Inactive ingredients for the tablet formulation are: anhydrous lactose, colloidal silicon dioxide, FD&C Red No. 40, FD&C Yellow No. 6, hypromellose, magnesium stearate, methylcellulose, microcrystalline cellulose, polyethylene glycol, sodium starch glycolate, stearic acid, and titanium dioxide. Each tablet, for oral administration, contains doxycycline hyclate equivalent to 50 mg or 100 mg doxycycline. Doxycycline Hyclate Tablets, USP meets USP Dissolution test 3. "Image Description"