National Toxicology Program

National Toxicology Program

Testing Status of AZT + TMP/SMX (mixture) combination - M940100




Synonyms/Common Names

  • AZT + TMP/SMX (mixture) combination (AIDS)
  • AZT + Trimethoprim/Sulfamethoxazole (mixture) combination


  • 30516-87-1 - 3'-Azido-3'-deoxythymidine (AIDS)
  • 30516-87-1 - AZT transplacental carcinogenesis study
  • 723-46-6 - Sulfamethoxazole
  • 738-70-5 - Trimethoprim
  • TMPSMXMIXNTP - Trimethoprim/sulfamethoxazole (mixture)

Known Uses

Experimental AIDS therapy

Short-Term Toxicity

  • 13 weeks (Gavage)  (C95004B)  Completed 
    • Mice: B6C3F1
  • 13 weeks (Gavage)  (C95004)  Completed 
    • Mice: B6C3F1

Special Studies

  • Toxicokinetic Study (Gavage; Intravenous)  (S0609)  Completed 
    • Citation: 3'-Azido-3'-Deoxythymidine (AZT) + TMP/SMX. Toxicokinetic study report. The toxicokinetics of 3'-azido-3'deoxythymidine (AZT) when administered alone and in combination with trimethoprim (TMP) and sulfamethoxazole (SMX) to male and female B6C3F1 mice. February 20, 2007
    • Male and Female Mice: B6C3F1
  • Toxicokinetic Study (Gavage)  (S0610)  Completed 
    • Male and Female Mice: B6C3F1

Organ Systems Toxicity

  • 30 days Repro/Dev Gen Tox (28-Day) (Gavage)  (RDGT95002)  Completed 
    • NIH Number: 99-3940
      Citation: NIEHS Technical Report on the Reproductive, Developmental, and General Toxicity Studies of 3'-Azido-3'-dioxythymidine (AZT), Trimethoprim (TMP)/ Sulfamethoxazole (SMX), and Folinic Acid Combinations Administered by Gavage to Swiss (CD-1®) Mice
    • Male and Female Mice: Swiss
    • Dose: Multiple.
NTP is located at the National Institute of Environmental Health Sciences, part of the National Institutes of Health.