"Breathe, Uchiha-san." Kabuto's voice is still light, because really, it's of no concern of his if the medicine doesn't agree with him. Intentionally he focuses his Chakra lower down, soothing the stomach muscles and forcing them to relax, all the while inducing a burst of endorphins to deaden the pain more effectively than any morphine. "It doesn't hurt nearly as bad as you're making yourself think it is."