I though fentanyl was/is a purely illegal drug. I didn't know that there is actual therapeutic use for it in conventional medicine. I thought it was just too strong. I know morphine is a legal, legitimate drug used often to mitigate pain, but I thought that fentanyl, being a 100x, or more, more powerful than morphine was some derivative that illicit drug manufacturers came up with to sell and make money. I mean that's all you ever hear about in the news, how so many ppl are dying of fentanyl overdoses and the like. I just didn't know that doctors actually prescribed fentanyl, or even had the option of prescribing fentanyl. My sister had extreme pain from cancer, and she never had fentanyl prescribed to alleviate her pain.