… Ranlar slowly rises from his wheelchair before collapsing under his own weight as his atrophied legs give out. Your party must now find a way to move him away from the orcs without using his newly healed legs, perhaps on a nearby chair with wheels.
I have wondered about using it post... Other things. Do healing spells reduce your refractory period? Could someone get Ed Greenwood to weigh in on this?
I think the refractory period is a hormone response and not tissue damage/fatigue. It could be 'healed' in a similar way horniness, PMS, pregnancy, tiredness (but not the need for sleep), hunger, and moods can be 'healed'.
It could also be a peripheral autonomic feedback response, in which case it could be 'healed' in a similar way to suppressing automatic breathing, bowel movements, automatic reflexes, and possibly the fine tuning of balance.
Such a spell could porobably exist, alongside a suite of other weird spells that were likely developed first, like Calm Emotions or unnamed but almost guaranteed to exist contraceptive spells. Some debuff spells of a unique variety could be quite interesting too, with breathing suppression being the rare effect that would require an intelligence save.
A potion would probably be the cheaper option though; plain old erection juice should suffice.