Stability of dobutamine hydrochloride in peritoneal dialysis solutions.
The stability of dobutamine hydrochloride in peritoneal dialysis solutions at 4, 26, and 37 degrees C was determined. Dobutamine (as the hydrochloride salt) was added to dialysis solutions containing 1.5% or 4.25% dextrose to concentrations of 2.5, 5.0, and 7.5 mg/mL. Samples were stored at 4, 26, and 37 degrees C to mimic refrigerator, room, and body temperature, respectively. At 0, 4, 8, and 24 hours, the samples were analyzed in triplicate by stability-indicating high-performance liquid chromatography to determine the percentage of drug remaining. More than 90% of the drug was retained under all storage conditions in 1.5% dextrose dialysate containing an initial dobutamine hydrochloride concentration of 5.0 or 7.5 micrograms/mL. The mean concentration in the samples containing an initial dobutamine hydrochloride concentration of 2.5 micrograms/mL and stored at room temperature remained greater than 90% of the initial concentration for the first four hours and then decreased to less than 90%. Dobutamine was stable in 4.25% dextrose dialysate regardless of the initial concentration or the storage condition. Dobutamine hydrochloride 5.0 and 7.5 micrograms/mL in 4.25% dextrose dialysis solution was stable under all the test conditions. Dobutamine hydrochloride 2.5 micrograms/mL was stable in 1.5% dextrose dialysate for only four hours at room temperature.
Gora
M L
ML
Pharmacy Drug Information Services, University of Cincinnati Hospital, University of Cincinnati, OH 45262-791.
Seth
S
S
Visconti
J A
JA
Shields
B
B
Bay
W
W
D015314:Dialysis Solutions / Q000032:analysis*; D004280:Dobutamine / Q000737:chemistry*; D004344:Drug Incompatibility; D004355:Drug Stability; D004356:Drug Storage; D005069:Evaluation Studies as Topic; D006801:Humans; D010530:Peritoneal Dialysis; D013997:Time Factors
D015314:Dialysis Solutions; D004280:Dobutamine