Max, if you would like a copy of the English translation of the ancient Vinaya texts that specifically mention drugs, including hemp and the use of alcohol in medicines, you can download a pdf of the Mahavagga sections V-X and the Culavagga sections I-III
here.
It is a scanned copy of a paper book, so you won't be able to do any automated searches. Section VI, the section on medications, begins on the pdf page #45, or the book page #41. The page where alcohol is allowed in the medications is on pdf page #59/book page #55, and the page where it specifically mentions marijuana is pdf page #61/book page #60. Throughout the chapter, the Buddha makes it clear that non-food medications were only to be used when the need arises, and are not to be used recreationally.
LOL! Ancient Buddhist scripture is NOT silent on the matter, as far as the rules for monks and nuns go.
Buddha allowed drugs as needed. He disallowed the recreational use of drugs among the monks and nuns. It's quite straightforward, if you care to check it out.
On the contrary, Buddha allowed alcohol in medications. He allowed all forms of needed medicines when the need arises. I reference the text and where you can read it for yourself in this post.