Compatibility of Omadacycline With Select Parenteral Products in Simulated Y-site Administration

Omadacycline is a broad-spectrum intravenous and oral tetracycline antibiotic approved for the treatment of community-acquired bacterial pneumonia and acute bacterial skin and skin structure infections. Available information on the compatibility of intravenous omadacycline is limited to sterile water, 0.9% sodium chloride, and 5% dextrose via a dedicated line. The objective of this work was to determine the intravenous compatibility of omadacycline with commonly used intravenous fluids and medications using simulated Y-site administration.

Omadacycline was prepared at concentrations consistent with a maintenance dose (1 mg/mL) and a loading dose (2 mg/mL) with 0.9% sodium chloride according to the prescribing information. Compatibility via simulated Y-site administration was assessed with selected crystalloids (lactated Ringer's solution, magnesium sulfate, and normal saline with potassium chloride) and intravenous medications (bumetanide, furosemide, heparin, and insulin). Y-site administration was simulated by mixing 5 mL of omadacycline with 5 mL of each parenteral product prepared at standard concentrations for infusion. Compatibility was assessed by using visual, Tyndall beam, microscopy, and spectrophotometry methods at 0, 30, and 60 minutes.

Omadacycline appeared physically compatible with lactated Ringer's solution, magnesium sulfate, normal saline with potassium chloride, bumetanide, heparin, and insulin at standard infusion concentrations. However, although the lower concentrations of omadacycline 1 mg/mL and furosemide 2 mg/mL showed compatibility, higher concentrations of either agent in combination resulted in incompatibility.

Omadacycline appeared physically compatible with all products tested and incompatible with furosemide. Simultaneous administration of omadacycline with tested intravenous medications, except furosemide, is suggested to be safe.