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."  

رَخَّصَ النَّبِيُّ ﷺ الرُّقْيَةَ مِنْ كُلِّ ذِي حُمَةٍ