In 2022, Khan released a book outlining his memoirs as the juniormost lecturer in BRD Medical College's paediatrics division. The book, titled The Gorakhpur Hospital Tragedy: A Doctor’s Memoir of a Deadly Medical Crisis, which was released soon after his termination from the college, spoke about his experiences of helping patients at the time of the crisis and also his struggle after standing up to the Yogi Adityanath-led government. In the book, he claims Adityanath asked said he will see to him (Dekh lunga tujhe) for his apparent insolence. In September 2020, the doctor had met with Congress's Priyanka Gandhi and spoken against the rampant use of laws like NSA and UAPA.
With the nominations for the Legislative Council Elections on Tuesday, Khan joins a list of candidates fielded by the SP, marking his formal entry into politics.