Prothiadin is a tricyclic antidepressant used to treat a variety of psychological and physical conditions. It is used to treat various degrees of depression, control anxiety and chronic stress, treat certain sleep disorders such as insomnia, and relieve chronic pain associated with certain conditions such as nerve pain resulting from diabetic neuropathy. Prothiadin is sometimes used to treat other disorders or specific symptoms at specific doses as directed by a physician. The drug should be used under direct medical supervision to avoid any complications or side effects resulting from misuse.