Pharmaceutical composition and a method for manufacturing the same

Pharmaceutical compositions comprising omeprazole, with an improved shelf-life, and a method for manufacturing the same. Also claimed is a vehicle which comprises a viscosity enhancing component, a wetting agent, a pH buffer and a polyol. A pharmaceutical composition is also disclosed, comprising the aforementioned vehicle and an active pharmaceutical ingredient, such as omeprazole. Further, a method of manufacturing the same comprises the steps of mixing a viscosity enhancing component with a wetting agent to form a mixture and adding a pH buffer and a polyol to the mixture to form a vehicle. In a preferred embodiment of the vehicle, the viscosity enhancing component is sodium carboxymethyl cellulose, the wetting agent is propylene glycol, the pH buffer is sodium bicarbonate and the polyol is maltitol.