Some side effects with zidovudine, while occurring infrequently, are potentially serious and should be reported immediately to your healthcare provider. These include but are not limited to:
Anemia
Frequent infections, which may be a sign of low neutrophil levels in the blood (known medically as neutropenia)
Unusual bleeding or bruising, which may be a sign of low blood platelets (known as thrombocytopenia)
Symptoms of lactic acidosis (too much lactic acid in the blood), such as:
Feeling tired or weak
Muscle pain
Trouble breathing
Stomach pain
Feeling cold
Cold or blue hands and feet
Dizziness or lightheadedness
A slow or irregular heartbeat
Persistent nausea, vomiting, and abdominal pain
Shortness of breath
An enlarged or tender liver
Weight loss
Signs of liver problems, such as:
Yellow eyes or skin (jaundice)
Dark urine
Liver enlargement or pain
Changes in the distribution of fat on your body (such as a "buffalo hump")