Azathioprine

**Definition:** An immunosuppressive agent used in combination with cyclophosphamide and hydroxychloroquine in the treatment of rheumatoid arthritis. According to the Fourth Annual Report on Carcinogens (NTP 85-002, 1985), this substance has been listed as a known carcinogen. (Merck Index, 11th ed)

**Tree numbers:** - D02.886.759.111 - D03.633.100.759.570.090 - D13.570.900.111

**Synonyms:** - Azothioprine