Fentanyl
"I suffer from severe chronic cluster head aches that last 3 or more days at a time.I had back problems as well,at work one day I fell 30 feet & landed in a wheelbarrow.I hit my neck on one side and injured my L4 L5. I've been n pain management sense 07 long story short I ended up on 75mcg patches ever 48 hours. They did not last 72 hours for me.I was given 600mcg fentanyl lozenges they r fast acting.I was given 1 every 6 hrs. Best brake through meds I've use.u can suck on them 4 15 min.yet if ur pain subsides u can stop after 5/10 min they take 15 min to de solve.u can store what is left n the package n ur refrigerator n use it later when needed.pills don't always work rite away n some times u don't need as much."