It is assumed that most abuse is by the oral route, though there are reports of frequent I.V. use. Moderately strong analgesic in normal doses. Larger doses can cause sedation, confusion, hallucinations. G.I. side effects, even bleeding, can occur especially when compounded with aspirin. Abuse is currently sporadic.
Verification is usually straightforward.
Expect most positive donors to have a prescription. Please email your comments and contributions.