"i was first prescribed oxycodone 5 mg/2 tabs/twice daily, as required. then put on the 25 mg/mgh fentanyl patches.  they were a god send.  the only problem i had was that every 50 hours (average) they would stop working.  i had to have someone from mylan, send me a letter to show to my doctor in order to change to every 48 hours.
"