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DOXIL (doxorubicin HCl liposome injection) is doxorubicin hydrochloride (HCl) encapsulated in STEALTH® liposomes for intravenous administration.
Doxorubicin is an anthracycline topoisomerase inhibitor isolated from Streptomyces peucetius var. caesius.
Doxorubicin HCl, which is the established name for (8S,10S)-10-[(3-amino-2,3,6-trideoxyα- L-lyxo-hexopyranosyl)oxy]-8-glycolyl-7,8,9,10-tetrahydro-6,8,11-trihydroxy-1-methoxy5,12- naphthacenedione hydrochloride, has the following structure:
DOXIL® (doxorubicin HCl) Structural Formula Illustration
The molecular formula of the drug is C27H29NO11•HCl; its molecular weight is 579.99.
DOXIL (doxorubicin hcl liposome injection) is provided as a sterile, translucent, red liposomal dispersion in 10-mL or 30-Ml glass, single use vials. Each vial contains 20 mg or 50 mg doxorubicin HCl at a concentration of 2 mg/mL and a pH of 6.5. The STEALTH® liposome carriers are composed of N-(carbonyl-methoxypolyethylene glycol 2000)-1,2-distearoyl-sn-glycero3- phosphoethanolamine sodium salt (MPEG-DSPE), 3.19 mg/mL; fully hydrogenated soy phosphatidylcholine (HSPC), 9.58 mg/mL; and cholesterol, 3.19 mg/mL. Each mL also contains ammonium sulfate, approximately 2 mg; histidine as a buffer; hydrochloric acid and/or sodium hydroxide for pH control; and sucrose to maintain isotonicity. Greater than 90% of the drug is encapsulated in the STEALTH® liposomes.
MPEG-DSPE has the following structural formula:
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