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Please note: All Prescription drugs require a prescription from the prescriber prior to shipment.

Azathioprine rx

Azathioprine rx


What is Azathioprine?

Azathioprine works to suppress the immune system when it is attacking your pet’s own body. It is used to treat disorders in dogs such as hemolytic anemia, thrombocytopenia, some chronic liver, kidney, and stomach / intestinal diseases, and arthritis and skin diseases caused by a immune-mediated issue. It may be used very cautiously and at low doses in cats to treat immune-mediated skin disorders.

 Azathioprine requires a prescription from your veterinarian, and is sold per tablet.


Dogs and Cats


  • Treats autoimmune disorders such as those involving the skin, blood, or multiple body systems
  • Easy to administer


Azathioprene’s immunosuppressing effects tend to be more severe in cats and may be dangerous. Do not give this medication to breeding or pregnant pets. Azathioprine can be absorbed through skin. Pet owners should wear gloves when giving this medication and wash hands afterwards.

Brand Name


Generic Name


What happens if I miss giving a dose:

Give the dose as soon as possible. If it is almost time for the next dose, skip the missed dose, and continue with the regular schedule. Do not give your pet two doses at once.

Possible side effects of Azathioprine:

  • Pale nose or gums
  • Jaundice
  • Infections due to suppressed immune system
  • Vomiting
  • Diarrhea
  • Fever
  • Lethargy
  • Loss of appetite
  • Bruising


Should be stored at room temperature, away from moisture and light. Keep away from pets and children.


Give this medication as directed by your veterinarian. Azathioprine may be given with food or without food. Do not abruptly stop giving the medication. Azathioprine needs to be tapered off over several months according to your veterinarian's directions.


Dogs/Puppies:All weightsVaries dependent on condition treated.
Cats/Kittens:All weightsVaries dependent on condition treated.


Active IngredientsAmount
Azathioprine, USP50 mg
  • Treats autoimmune disorders such as those involving the skin, blood, or multiple body systems
  • Easy to administer


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