Azathioprine-Induced Pancytopenia and Septic Complications: A Probable Cause of Death

Area of Science:

• Immunology
• Pharmacology
• Neurology

Background:

• Azathioprine is an immunosuppressant frequently used for autoimmune conditions like myasthenia gravis.
• Myasthenia gravis is an autoimmune neuromuscular disorder affecting voluntary muscle function.
• Azathioprine is known to have potential myelotoxicity as a side effect.

Observation:

• A 55-year-old male with myasthenia gravis and chronic kidney disease was treated with azathioprine.
• Within three weeks, the patient developed severe pancytopenia, presenting with weakness, giddiness, and watery stools.
• Initial hematological counts were normal before azathioprine initiation.

Findings:

• Azathioprine was identified as the likely cause of severe pancytopenia.
• Despite drug withdrawal and supportive management, the patient experienced cardiac arrest and septic shock.
• An adverse drug reaction assessment confirmed a plausible causal link between azathioprine and the observed toxicity.

Implications:

• This case underscores the critical importance of close hematological monitoring in patients receiving azathioprine.
• Early recognition and management of azathioprine-induced myelotoxicity are crucial for patient outcomes.
• Consideration of alternative immunosuppressive therapies may be warranted in patients with risk factors for severe adverse drug reactions.