Does pain relief get more potent with more hits at one time?

I have a question about medical marijuana I’m using for chronic pain. My doctor told me u only take a small hit time it 6-8 seconds is all your supposed to have and hold it for no more then 2 seconds or your just getting lack of oxygen not really more high. I have friends I met at dispensaries etc who swear weed strains I have used completely eliminate pain actually one lady who had shoulder surgery smokes a lot and swears it works better the the pills doctors gave her. I went for my revert today and doctor assured me again the point to medical marijuana is to be able to still safely drive and function and work not be so lazy and do nothing all day long.

My question is the more weed you vape or smoke at one time does the pain relief get better? There’s people who swear there get great pain relief and can pass out easily I’m a good indica. It works for me but it’s not that great all the time. When I use a vaporizer it’s always more in the head then body.

I just want this stuff to people able to work for me the way it does other people. It does a great job relaxing me calling me down and relieving anxiety and stress a lot better then pain, and I rarely feel the need to sleep. Deep relaxation yes but compared to propofol and other general anesthetics for sedation weed has never once been like that for me and the doctor told me a pure indica should be some where’s close to it not that strong but should glue you to a couch and be hard to fight off wanting to sleep.