Regarding the verb drug, meaning to drag, the OED informs us that the origin is unknown. It does predate drag, which has the same meaning, but they could have separate origins.
Drug is marked obsolete except in certain dialects, such as English and Scottish regional (southern).
Was it only used as the past tense and past participle of drag, (He had drug me through the bushes), although I noticed that a few of OED’s entries submitted the weak verb form as a regular verb, drug, drugged drugged?
a1706 Mare of Collingtoun (1751) 11 Then in a grief he did her hail, And drugged both at main and tail.
I’ve never read or heard it being used as a regular verb and rarely as the past tense or past participle for drag. What say you?