My friend had a tooth extracted; was given the usual nerve duller and a shot of something afterwards and a prescription for 325 mg tablets hydrocodone; He had prescription filled and began taking the hydrocodone a day later; The Hydrocodone made him very tired and dizzy. He is diabetic, is seventy-five years old; Is this dosage too high for him? Or should he have been prescribed hydrocodone at all for after pain from a tooth extraction?