House is an atheist. He openly and relentlessly mocks colleagues and patients who express any belief in religion, deeming such beliefs as illogical. He does not believe in an afterlife because he finds it is better to believe life "isn't just a test". However, in the season four episode "97 Seconds", he expresses sufficient interest in the possibility of an afterlife to electrocute himself in an effort to find out; he is dissatisfied with the results and denounces the possibility of an afterlife. This is also an example of House's tendency to self-experiment and submit to risky medical procedures in the name of truth. Over the course of the series, he disproves the effectiveness of a migraine cure by self-inducing a migraine and controlling the effects through drugs, undergoes a blood transfusion to assist with a diagnosis, and overdoses on physostigmine to improve his memory after sustaining head injuries, subsequently causing his heart to stop beating, then undergoes deep brain stimulation soon after. In "The Fix", he steals experimental medicine only tested in rats to try and regrow his thigh muscle, eliminating his pain. In the following episode, "After Hours", he finds out that the medicine cause tumors, and operated on himself in his bathtub based on a CT scan. Ultimately he is unable to continue and eventually brought in Cuddy, who sends him to the hospital.