Description
VELAKAST is a fixed-dose combination tablet containing sofosbuvir and velpatasvir for oral administration. Sofosbuvir is a nucleotide analog HCV NS5B polymerase inhibitor and velpatasvir is an NS5A inhibitor. Each tablet contains 400 mg sofosbuvir and 100 mg velpatasvir. The tablets include the following inactive ingredients: copovidone, croscarmellose sodium, magnesium stearate, and microcrystalline cellulose. The tablets are film-coated with a coating material containing the following inactive ingredients: Titanium Dioxide IP and Brilliant Blue FCF, polyethylene glycol, polyvinyl alcohol, talc, and titanium dioxide.
Effect of the drug
Thanks to the powerful composition of the drug, Velakast APRAZER HEALTHCARE is widely used to fight the hepatitis C virus of genotypes 1-6. The drug may be given as a monotherapy or for combined treatment with or without cirrhosis. The high effectiveness of the drug against all genotypes of HCV is due to the presence in its composition:
Sofosbuvir: The IUPAC name for sofosbuvir is (S)-Isopropyl 2-((S)-(((2R,3R,4R,5R)-5(2,4-dioxo-3,4-dihydropyrimidin- 1(2H)-yl)-4-fluoro-3-hydroxy-4-methyltetrahydrofuran- 2yl)methoxy (phenoxy)phosphorylamino)propanoate. It has a molecular formula of C22H29FN3 O9 P and a molecular weight of 529.45. Sofosbuvir is a white to off-white crystalline solid with a solubility of at least 2 mg/mL across the pH range of 2–7.7 at 37°C and is slightly soluble in water.
Velpatasvir: The IUPAC name for velpatasvir is Methyl {(1R)-2-[(2S,4S)-2-(5-{2[(2S,5S)-1-{(2S)-2-[(methoxycarbonyl) amino]-3-methylbutanoyl}-5-methylpyrrolidin-2-yl]1,11-dihydro[2]benzopyrano[4′,3′:6,7]naphtho[1,2-d]imidazol-9- yl}-1H-imidazol-2-yl)-4(methoxymethyl)pyrrolidin-1-yl]-2-oxo-1-phenylethyl}carbamate. It has a molecular formula of C49H54 N8 O8 and a molecular weight of 883.0. Velpatasvir is practically insoluble (less than 0.1 mg/mL) above pH 5, slightly soluble (3.6 mg/mL) at pH 2, and soluble (greater than 36 mg/mL) at pH 1.2.
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