"For all the good it'll do me may as well shove it up my arse" Renton - Trainspotting

...I'll pass, thanks. It sounds like sub-lingual would be an effective route. That said, if you're in a lot of pain... bombs away.

Fun fact, in cases of dehydration where an IV is not available the best means of hydration is via the colon. So if you are in a situation where it is impossible to hydrate a person due to vomiting and emergency services are not available...

Sounds like that doctor is blowing smoke up someones ass.