Gemcitabine Actavis

Country: Australia

Language: English

Source: Department of Health (Therapeutic Goods Administration)

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Active ingredient:

Gemcitabine hydrochloride

Available from:

Actavis Australia Pty Ltd

Class:

Medicine Registered

Summary of Product characteristics

                                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
                                
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