Marijuana has far more cannabinoids in it than just THC, take CBD for example, arguably the second most popular cannabinoid; CBD is a pain relief at its finest, i would even go so far as to say CBD is more healthy and useful for you than aspirin, without the downsides. I have used CBD oil infused lotions many times on my torn MCL and during recovering it made most of the pain not bother me usually without taking a single pill. Here is some further literature on it: http://www.leafscience.com/2014/02/23/5-must-know-facts-cannabidiol-cbd/

Don't even get me started out how horrible all these pills are for people, I have had MANY patients/customers who quite literally sell their pills from the doctor and turn around and purchase cannabis and/or cannabis oils with the money.