"i was put on duragesic when the ms contin wasn&#039;t enough to control my chronic pain, osteoarthritis and fibromyalgia, even with breakthrough medicines. at first the patches worked well once i got up to a dose that worked. the only horrible drawback is that i live in the desert and once the daytime temperatures got over about 90 degrees f the patches began dumping more because of the heat. i finally had to quit using them, due to side effects brought on by the high temperatures. also at times i would just fall asleep. i finally quit the patches all together when i fell asleep driving and almost had a bad, bad wreck. i feel the patches work great for people who don&#039;t have to deal with high outside temperatures."