Oseltamivir Phosphate 30mg capsules,is an Anti-viral medication used to treat and prevent influenza A and B viruses. It works by inhibiting the activity of the virus, reducing the duration and severity of symptoms. Generic Oseltamivir Phosphate capsules Philippines Dosage: Each capsule of Indian Oseltamivir Phosphate 75mg Capsules USA of the active ingredient. The recommended dosage for adults and adolescents is 75mg twice daily for five days.