I'll be honest I used to love the Fentanyl lollipops I used to steal them from my dad when he was dying of Cancer.........
They are very powerful and fast acting.........if people are not used to opiates or have a high tollerance for opiates this med is defenatley way to strong........
Here's a site for conversion:
http://www.medcalc.com/narcotics.html
First synthesized in Belgium in the late 1950s, fentanyl, with an analgesic potency of about 80 times that of morphine, was introduced into medical practice in the 1960s as an intravenous anesthetic under the trade name of Sublimaze®.
Fentanyl is much stronger than Morphine.........they made my dad sick too it was to strong for him........
I cant find any good or reliable conversions online, many are different and contradict others.
You can google morphine conversion. Im not sure of the answere.