<prompt> Azidothymidine Zidovudine, commonest side effect isHyperuricemiaPancreatitisPeripheral neuropathyMacrocytic anaemia  <response>: Ans. is d i.e., Macrocytic anaemia The most common adverse effect of zidovudine is myelosuppression, resulting in macrocytic anemia 1-4 or neutropenia 2-8. So most common side effect of zidovudine is neutropenia 2-8 followed by macrocytic anemia 1-4. Other side effects are - nausea, anorexia, headache, insomnia, abdominal pain, myalgia, malaise, fatigue, myopathy, lactic acidosis, hepatomegaly with steatosis, convulsions and encephalopathy. 