If it were involuntary, it would show up as a blemish in is criminal record. perhaps not as an indictment or conviction, but it would show up. But the report said there was Nothing in his criminal file. As long as you are using your Rx meds as directed, there's only one Rx med that bars you from possession of firearms... Medical marijuana. Can you get Rx medical marijuana in Ohio?
(Disclaimer: I'm no expert in LEADS, etc.)
I think it wouldn't show up in a criminal record. It might show up in a background check. Even then, it would only show if it was reported properly. One in the far past, before the proliferation of the internet and easy records transfer, might not show up as it may have never been reported or transferred out of the county or facility.
As to the medication thing... yes, as long as the meds were as prescribed; I didn't mean those. I meant only those that weren't prescribed or were illicit. I thought of medical weed when I wrote the other reply but considered it an outlier. But, I wonder why or if methadone is different legally than medical marihuana a whole host of other drugs that are prescribed daily in the Buckeye State.
Ohio, IIRC, once accidentally legalized it in the 1990's (I read about this a while back but can't find a source right now). It was a fluke and quickly repealed. As of right now, I know of no laws legalizing medical marijuana in Ohio.
ETA: Ohio's Short Lived Medical Marijuana Law --
http://ohiopatientsnetwork.org/inde...test-medical-marijuana-law&catid=42:marijuana