Azathioprine — Uses, Dosage, Side Effects & Safety

Drug class: Immunosuppressant (Antimetabolite)

Overview

Azathioprine is a prescription medication used to suppress the immune system. It is commonly prescribed to prevent organ rejection after a transplant and to treat autoimmune diseases such as rheumatoid arthritis, systemic lupus erythematosus, inflammatory bowel disease (Crohn's disease and ulcerative colitis), and some other conditions where the immune system attacks the body's own tissues. Azathioprine works by interfering with the production of DNA in immune cells, which reduces their activity. This helps to decrease inflammation and prevent the immune system from attacking healthy tissues or transplanted organs. Key points for patients: Azathioprine can increase your risk of infections and certain cancers. Regular blood tests are needed to monitor for side effects. Always take this medication exactly as prescribed and do not stop without consulting your healthcare provider.

Therapeutic uses

• Autoimmune diseases
• Organ transplantation
• Certain cancers

Common side effects

• Nausea
• Vomiting
• Loss of appetite
• Bone marrow suppression
• Increased risk of infection
• Liver damage
• Pancreatitis
• Increased risk of certain cancers

Frequently Asked Questions about Azathioprine

What conditions does azathioprine treat?

Azathioprine is used to prevent organ rejection after transplantation and to treat autoimmune diseases such as rheumatoid arthritis, lupus, Crohn's disease, and ulcerative colitis.

How long does it take for azathioprine to work?

It may take several weeks to months for azathioprine to show its full effect, especially in autoimmune diseases. Your doctor will monitor your progress with regular blood tests.

Can I get vaccines while taking azathioprine?

You should avoid live vaccines while taking azathioprine, as your immune response may be weakened. Inactivated vaccines are generally considered safe, but always consult your doctor first.

Is azathioprine safe during pregnancy or breastfeeding?

Azathioprine may cause birth defects and is generally not recommended during pregnancy unless the benefits outweigh the risks. It is excreted in breast milk and should be avoided while breastfeeding. Discuss with your healthcare provider.

What monitoring is required while on azathioprine?

Regular blood tests are needed to monitor your white blood cell count, liver function, and kidney function to detect side effects early.

What should I do if I develop signs of infection?

Contact your doctor immediately if you develop fever, chills, sore throat, or other signs of infection, as azathioprine can suppress your immune system.

Can azathioprine cause cancer?

Long-term use of azathioprine may increase the risk of certain cancers, especially skin cancer and lymphoma. Regular check-ups and skin examinations are recommended.

Educational information only. Always consult a qualified healthcare professional before starting, stopping, or changing any medication.