I asked ʿAisha about treating poisonous stings (a snake-bite or a scorpion sting) with a Ruqya. She said, "The Prophet ﷺ allowed the treatment of poisonous sting with Ruqya." (Using translation from Bukhārī 5741)
«رُخَّصَ رَسُولُ اللهِ ﷺ فِي الرُّقْيَةِ مِنْ كُلِّ ذِي حُمَّةٍ»