Percocet is considered stronger than Vicodin, but both will do the trick and I personally have always enjoyed the feeling from Vicodin a little more. Both medications are available in 5mg, 7.5mg, and 10mg pills. Each pill is mixed with about 500mg of Tylenol, which isn't your liver's bestfriend, so if you can get the 10mg pills, go for it. Depending on your weight, I would start out with about 20mg. If 45 minutes to an hour passes and you're not really feeling it, go for another 10mg or 20mg. If another 30 minutes passes with still no results, sorry, this just isn't the drug for you. It is possible to feel nothing on your first try, so you may want to try again in a couple days. As far as price is concerned, you should be paying a MAXIMUM of $5 for a 10mg pill or $2.50 for a 5mg pill. Generally 50 cents a milligram is considered acceptable. Some people do charge between $8 and $10 for 10mg pills, but thats really overkill. It'd be easier to just go to your doctor and complain of backpain.