Methylprednisolone sodium succinate in pediatric parenteral nutrition: influence of vehicle injection

Compatibility and stability of methylprednisolone sodium succinate and granisetron hydrochloride in 0.9% sodium chloride solution

A combination of methylprednisolone sodium succinate (MSS) and granisetron hydrochloride (GH) is generally devoted to treating the chemotherapy-induced nausea and vomiting. To date, none of these novel mixtures have been commercially available. The present study was aimed at investigating physical and chemical compatibility and stability of a combination of MSS with GH in 0.9% sodium chloride injection for 72 hours at 4°C and 25°C. A mixture of MSS (0.4-0.8 mg/mL) with GH (0.03 mg/mL) was prepared and stored in both polyvinyl chloride bags and glass bottles using 0.9% sodium chloride injection as a diluent. The study was performed using a validated and stability-indicating high-performance liquid chromatography method. The physical compatibility was assessed by a spectrometer. Furthermore, the pH measurement of each sample was measured electronically. All test solutions stored at 4°C or 25°C had a no >2% loss of the initial concentration throughout the 72-hour study period. All solutions remained clear and colorless throughout the study and were without precipitation or turbidity in any of the batches. The drug mixtures of MSS (0.4-0.8 mg/mL) and GH (0.03 mg/mL) in 0.9% sodium chloride injections were physically and chemically stable for at least 72 hours when stored at 4°C or 25°C in polyvinyl chloride bags or glass bottles.

Continuous infusion of methylprednisolone via paediatric parenteral nutrition: A pharmacokinetic animal study

BACKGROUND & AIMS

The aim of our study consisted to measure the pharmacokinetic parameters of methylprednisolone administered in a continuous infusion of a paediatric parenteral nutrition mixture for 24h in the rabbit.

METHODS

Fourteen rabbits were split into two groups and assigned a different administration vehicle (all-in-one or two-in-one nutrition mixture). We used USC PACK* pharmacokinetics software to compare the influence of the composition of the paediatric parenteral nutritional solutions on the values of the pharmacokinetic parameters of methylprednisolone.

RESULTS

Neither the steady-state plasma concentrations of methylprednisolone hemisuccinate nor the values of the pharmacokinetic parameters of methylprednisolone differed significantly when administered in two-in-one or all-in-one nutrition mixtures.

CONCLUSIONS

The composition of the nutritional medium had no discernable effect on the bioavailability of methylprednisolone. Neither the speed at which the steady-state plasma concentration was reached, nor the values of the pharmacokinetic parameters of methylprednisolone were significantly modified.