I have a question about tolerance.I have been on MS Contin,and Percocet for about 3 years,and over that time I have gotten increases to where I am now which is 300MGs MS Contin and 60MGs percocet.My question is,if I take my meds as directed can I keep my tolerance where it is?Or is there a way to keep it from going up?Maybe taking a little less once in a while? I don't want to go any higher on the dosage,what I am on now makes certain activities difficult as it is.Thanks for any help.