Retrovir is contra-indicated in patients known to be hypersensitive to zidovudine, or to any of the excipients listed in Description.
Retrovir should not be given to patients with abnormally low neutrophil counts (less than 0.75 x 109/litre) or abnormally low haemoglobin levels (less than 7.5 g/decilitre or 4.65 mmol/litre).
Retrovir is contra-indicated in newborn infants with hyperbilirubinaemia requiring treatment other than phototherapy, or with increased transaminase levels of over five times the upper limit of normal.