my friend said he injected benzos into his incisors (teeth)

is this something you can actually do or is he hallucinating. (he was in the hospital for the weekend for his xanax addiction but he got out yesterday told me he was sorry. i asked him why fearing the worst and he told me that he injected Alprazolam into his incisors, among taking other pills) so is this possible or is he hallucinating/imagining things again?

Edit: here is his most recent text with no reply since

“ended up being my almost death record i took 30 or more pills in total and started to inject alwzapram into my incisors”