National Cancer Institute National Cancer Institute
U.S. National Institutes of Health National Cancer Institute
Dictionary of Cancer Terms
Send to Printer
rapid-onset opioid

 An opioid that relieves pain quickly. Opioids are drugs similar to opiates such as morphine and codeine but do not contain and are not made from opium.

Previous Definitions:ranpirnase, Rapamune, rapamycin, rapid eye movement sleep, rapid hormone cycling
Next Definitions:Raptiva, ras gene, ras peptide, rasburicase, rattlesnake root