By the way, this shows the lie inherent in medical marijuana legalization. It's been available for a long time, just not in a formulation designed to hit you all at once (inhaled vapors hit almost as fast as IV injections), and the faster it hits, the more it'll produce a high, and the faster it'll be gone. Cancer patients who wanted to use the natural weed ate it in brownies. Gives a nice slow onset, and a long duration, which is what you need if you're ACTUALLY in pain, and not trying to get high.
As a sufferer of chronic pain, I'm going to have to disagree with this premise when it comes to pain (not specifically nausea). My experience with pain has given me a few insights about myself personally. I can't really speak for others, but perhaps other sufferers will chime in. I have stenosis in my cervical vertebrae. The pain at times has been unbearable.
First, I try to avoid painkillers if possible. They affect the speed at which I think, which I find disturbing. I also make more mistakes (interestingly, I make a lot of mistakes with fevers over 100). When I'm ready for a painkiller, I want it to act quickly. What I find is that I need to "get ahead" of the pain so to speak. The sooner I can get ahead of it, the quicker I can manage it on my own. It's like it bubbles over, and I need help to recover. The shots I've gotten in the ER work wonders!
That leads me to my second observation, which is related. A very big factor in pain is the associated anxiety and stress. My experience with Vicodin and Percocet is not so much that they relieve the pain but that they make it so I care less about the pain. It's almost like "objectively" I recognize the pain sensations, but there's a sense of detachment with the painkillers.
Knowing that relief is not too far away in the form of a painkiller allows me to better manage my stress levels, which in turn lets me better manage the pain myself. However, I have to be careful not to let it get too bad because if I do, the painkiller itself doesn't work as well, and it takes longer.
I've never tried pot for pain, but I have used it before years ago. I found the effect was almost instantaneous whereas a painkiller seems to take 30 minutes to an hour. If you think a special, hour-long episode of "Full House" takes forever, try suffering from bad nerve pain for an hour. I would greatly appreciate an instant hit from painkillers.
In fact, I would probably use painkillers less if the effect was as fast as taking a hit from a joint. Why? Because I would be more willing to "stick it out" and try to overcome the pain myself. Right now I have to make a judgment call about how bad I think the episode might be. I'm sure I've pulled the trigger too soon just to play it safe. Those who don't suffer chronic pain probably don't understand that many of use tolerate far more pain than ordinary people do, so when I say "too soon" I mean by my standards, not the standards most people have.
I also recall the effects of pot being relatively short lived. A Percocet or Vicodin will affect me for six to eight hours, which is way too long. I'd be much happier with a short lived effect since usually an hour or two after the meds have kicked in, the pain level is reduced in large part (I think) because I've "gotten ahead of it" and have reduced my anxiety level.
One of my frustrations is that most of the doctors I've encountered have never suffered through chronic pain. Some might have had severe pain, but many haven't had that either. I think patients have a very different perspective on things, and I freely acknowledge that I may be in the minority.