As they do in the UK I believe. I was once in a branch of boots IIRC (boots is a UK pharmacist) in a midlands city where there was plenty of drugs problem. A rattily-dressed guy came in and they gave him half a measuring cup of some thick green liquid which he drank in half a minute, while he chatted with them. They were watching him carefully, 2 of the pharmacists.

I dunno but I guess that was methadone.

There's no reason to assume that they'd simply hand out the stuff, and if it was by medical staff who expected to be taken as they watched, that's ok I think.