An Open Label Evaluation of the Pharmacokinetics and Safety of Single Dose Intravenous Azithromycin in Preterm Neonates

Inclusion Criteria: 1. 24 to 37 weeks gestational age 2. postnatal age 0 to 30 days 3. May require therapy with antibiotics/anti-infectives 4. Have baseline Hematology labs available (hemoglobin, hematocrit, white blood cell and differential and platelet count), which have been obtained within the previous 72 hours, as part of their standard of care 5. Signed informed consent by the parent or guardian Exclusion Criteria: 1. Clinically significant hepatic disease (ALT or AST twice the normal value) 2. Clinically significant anemia (hemoglobin \< 10 gm %) 3. Neutropenia (absolute neutrophil count \< 500 cells/mm3) 4. Clinically significant renal disease \[Creatinine clearance twice the normal value, as calculated by the Schwartz formula : Length in cms x k (a constant) / S.Cr (Values for the constant are given in Appendix 1)\] 5. Cardiac rhythm abnormalities 6. Critically ill patients 7. Patients who are on or expected to be on the following concurrent medications carbamazepine, phenytoin, theophylline, digoxin, warfarin, ergot alkaloids, triazolam, cyclosporine, terfenadine, hexobarbital and antacids.