The tablet imprinted with "128" is Vasorex 10 mg, which contains amlodipine besilate, equivalent to 10 mg of amlodipine.
In more detail, Vasorex 10 mg tablets are described as white to off-white, round tablets. These tablets are marked with "C" on one side and "128" on the other. An alternative marking for Vasorex 10mg tablets is "3237" on one side and "WPI" on the other. Regardless of the imprint, the active ingredient in these tablets is amlodipine besilate, providing 10 mg of amlodipine per tablet. Amlodipine is a medication used to treat high blood pressure (hypertension) and certain types of chest pain (angina).