The Full form of ICT is Insulin Shock Therapy or Insulin Coma Therapy. ICT was a form of psychiatric treatment in which patients were repeatedly injected with large doses of insulin in order to produce daily comas over several weeks. It was introduced in 1927 by Austrian-American psychiatrist Manfred Sakel and used extensively in the 1940s and 1950s, mainly for schizophrenia, before falling out of favour and being replaced by neuroleptic drugs in the 1960s. ICT was one of a number of physical treatments introduced into psychiatry in the first four decades of the 20th century. These included the convulsive therapies (metrazol/cardiazol therapy and electroconvulsive therapy), deep sleep therapy and psychosurgery. Insulin coma therapy (ICT) and the convulsive therapies are collectively known as the shock therapies. Insulin coma therapy was a labor-intensive treatment that required a special unit and trained staff. Patients, who were diagnosed with schizophrenia, were selected on the basis of having a good prognosis and the physical strength to withstand an arduous treatment. There were no standard guidelines for treatment. Different psychiatrists and hospitals developed their own protocols. Typically, injections were administered six days a week for about two months.