Given the history of dangerous substances radically changing a person's physiology in Star Trek, they'll be fine. People turn into completely different species and then return to normal without any scarring, or indeed even a hair out of place.

I wish there was some time given to recovery from such extreme bodily trauma, but the precedent has been long established that you just spend a minute in sickbay, maybe get a hypospray, and you're back on duty in no time.