Gray baby syndrome (also termed Gray or Grey syndrome) is a rare but serious side effect that occurs in newborn infants (especially premature babies) following the accumulation of antibiotic chloramphenicol.
Signs and symptoms
Toxic levels of chloramphenicol after 2–9 days result in: loss of appetite, vomiting, ashen gray color of the skin, Hypotension (low blood pressure), Cyanosis (blue discolouration of lips and skin), Hypothermia, Cardiovascular collapse, hypotonia, abdominal distension, irregular respiration and increased blood lactate. [Source: Wikipedia 
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