A reversal agent is a substance or medication that can undo the effects or counteract the actions of another substance or medication. It reverses or neutralizes the effects of the original substance. Full definition
Spivak AM, Planelles V. Novel Latency Reversal Agents for HIV - 1 Cure. (beat-hiv.org)
The molecules, called acridones, act as powerful resistance reversal agents, but another region within each of them has malaria - killing activity itself. (sciencemag.org)
Some doctors have held off on switching patients to these drugs until there are more widely available bleeding reversal agents on the market — which may happen as soon as this year, Reuters notes. (fortune.com)