Commonwealth v. Griffith

OPINION

Justice McCAFFERY.

The issue presented in this case is whether expert testimony is required to convict a defendant of driving under the influence of a drug or combination of drugs, 75 Pa.C.S. § 8802(d)(2), when the drugs in question are prescription medications. Because the Superior Court erroneously concluded that expert testimony was required under this statutory provision, we reverse.

On May 31, 2006, Michelle Necole Griffith (“Appellee”) was charged by criminal complaint with driving under the influence of a drug to a degree which impairs the ability to drive safely, pursuant to 75…