Fentanyl
"After a month of continuous surgery, I shifted to oxycodone 30mg every four hours. It sedated me to the point of uselessness. My MD put me on equivalence of Fentanyl patches, and bam, no sedation, no euphoria, few side effects like nausea and mild insomnia. Very tolerable. Best part was great pain control without the baggage. I had to severely reduce klonopin during all this due to interactions but still find that half the previous dose of klonopin is still effective. Only real negative I've noted is interdose withdrawal symptoms prior to changing the patch. Always on the third day, so I'm going through patches a bit faster, tho still close to 72 hours. Maybe I'm just a fast metabolizer?"