Gokufuri Kyohi Shite Tesaguri Start! Tokka Shinai Healer, Nakama to Wakarete Tabi ni Deru - Ch. 45

[okasakisan]

"Dis-poison" is a pretty unusual way to word it.

yeah lol, my guess is that the author is trying to make it a very specific spell and not make it as strong as something like [heal],[cleanse] or [purify/purification]