Country: Australia
Language: English
Source: Department of Health (Therapeutic Goods Administration)
Gemcitabine hydrochloride
Actavis Australia Pty Ltd
Medicine Registered
Gemcitabine Actavis POWDER FOR INJECTION PRODUCT INFORMATION NAME OF THE MEDICINE Gemcitabine (as hydrochloride). The chemical name for gemcitabine hydrochloride is 4-Amino-1- (2-Deoxy-2,2-difluoro-ß-D-_erythro_-pentofuranosyl)pyrimidin-2(1_H_)-one hydrochloride. Its structural formula is: C 9 H 11 F 2 N 3 O 4 .HCl Molecular weight: 299.7 CAS No.: 122111-03-9. DESCRIPTION Gemcitabine hydrochloride is a white or almost white powder, which is soluble in water. The pH value is 2 to 3 in aqueous solution at 10 mg/mL, and the pKa is 3.6. GEMCITABINE ACTAVIS comes in three strengths of powder for injection and contains either 200 mg, 1000 mg or 2000 mg of gemcitabine (as hydrochloride). It also contains mannitol, sodium acetate and sodium hydroxide may be added to adjust pH 3.0 ± 0.2. PHARMACOLOGY Gemcitabine exhibits significant cytotoxic activity against a variety of cultured murine and human tumour cells. It exhibits cell phase specificity, primarily killing cells undergoing DNA synthesis (S- phase) and, under certain conditions blocking progression of cells through the GI/S-phase boundary. _In vitro_, the cytotoxic action of gemcitabine is both concentration and time dependent. In animal tumour models, the antitumour activity of gemcitabine is schedule dependent. When administered daily gemcitabine causes death in animals with minimal antitumour activity. However, when an every third or fourth day dosing schedule is used, gemcitabine can be given at non-lethal doses and have excellent antitumour activity against a broad range of mouse tumours. Mechanism of Action: Gemcitabine (dFdC) is metabolised intracellularly by nucleoside kinase to the active diphosphate (dFdCDP) and triphosphate (dFdCTP) nucleosides. The cytotoxic action of gemcitabine appears to be due to inhibition of Read the complete document