The protocol for executing prisoners in Ohio now mandates that the state use hydromorphone and midazolam, because pentobarbital / sodium thiopental, and pancuronium bromide are in short supply.
So, we have the interesting situation whereby lethal injection is carried out using drugs with known antidotes / antagonist agents.
naloxone reverses hydromorphone, and flumazenil reverses midazolam.
Can a condemned man be prescribed protective medicines to be taken immediately prior to an execution attempt?
I think it would be possible to protect an inmate against the effects of the Ohio execution protocol, for approx 1-4 hours, if they were given a shot of naloxone and flumazenil ~30 minutes before midnight.