Four members of a family of doctors committed suicide after failing to pay of their debts that ran in to nearly 50 lakh rupees. 60 year old Amanullah and his wife Naveeda Banu along with their two sons-Nawaz and Nizam injected themselves with large doses of anesthetics yesterday. Nawaz was also a doctor, while Nizam was studying to be one. The police found no suicide notes in the house.