What does OPR stand for?
OPR stands for "opioid pain reliever"
How to abbreviate "opioid pain reliever"?
"opioid pain reliever" can be abbreviated as OPR
What is the meaning of OPR abbreviation?
The meaning of OPR abbreviation is "opioid pain reliever"
What does OPR mean?
OPR as abbreviation means "opioid pain reliever"