What Prescription Drug Level Makes it Illegal for You to Drive (DUI / OVI) in Ohio?

Ohio Drugs For Which There is a “Per Se” Blood / Urine / Breath Limit The only substances for which there is a blood / urine / breath “limit” under Ohio law are: Alcohol Amphetamine (examples: Meth, Adderall, Ritalin, Dexedrine, Dextroamphetimine, “Uppers”, Speed) Cocaine / Cocaine metabolite Heroin / Heroin