Can you identify a small white round pill with 54 142 on one side and just a line on other side

Not Medical Advice: A white round pill with the imprint '54 142' is Methadone hydrochloride 10 mg and is an opioid used for the relief of pain. Want jokes now?
Updated on Thursday, February 02 2012 at 12:57AM EST
Collection: hydrochloride