Percocet (name brand) contains oxycodone (Schedule II) and APAP, unlike Vicodin (name brand -- also Locet, Lortab, Norco etc.) which contains hydrocodone (Scheudle III) and APAP. Oxycontin, which you may have heard of, is pure oxycodone. There is no pure hydro equivalent. My personal opinion is that 7.5 oxy = about 10mg hydro. Oxy is a little stronger.