Ahmed Okasha M.D., PhD, FRCP, FRCPsych, FACP(Hon.) is an Egyptian psychiatrist. He is a professor of psychiatry at Ain Shams University, Cairo, Egypt. He wrote many books and articles about psychiatry and mental disorders. He is the first Arab–Muslim to be president of World Psychiatric Association from 2002 to 2005.
Professor okasha explains the difference between efficacy and effectiveness of antidepressants and how can we select among them