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  • Title: Stability of Azathioprine, Clonidine Hydrochloride, Clopidogrel Bisulfate, Ethambutol Hydrochloride, Griseofulvin, Hydralazine Hydrochloride, Nitrofurantoin, and Thioguanine Oral Suspensions Compounded with SyrSpend SF pH4.
    Author: Polonini H, da Silva SL, Cunha CN, Ferreira AO, Anagnostou K, Dijkers E.
    Journal: Int J Pharm Compd; 2020; 24(3):252-262. PubMed ID: 32401746.
    Abstract:
    To allow for tailored dosing and overcome swallowing difficulties, compounded liquid medication is often required in pediatric patients. The objective of this study was to evaluate the stability of oral suspensions compounded with SyrSpend SF PH4 and the commonly used active pharmaceutical ingredients azathioprine (powder) 50 mg/mL, azathioprine (from tablets) 50 mg/mL, clonidine hydrochloride (powder) 0.1 mg/mL, clopidogrel bisulfate (from tablets) 5 mg/mL, ethambutol hydrochloride (powder) 50 mg/mL, ethambutol hydrochloride (from tablets) 50 mg/mL, ethambutol hydrochloride (powder) 100 mg/mL, griseofulvin (powder) 25 mg/mL, hydralazine hydrochloride (powder) 4 mg/mL, nitrofurantoin (powder) 10 mg/mL, and thioguanine (powder) 2.5 mg/mL. Suspensions were compounded at the concentrations listed above and stored at controlled room and refrigerated temperatures. Stability was assessed by measuring the percentage recovery at 0 day (baseline), and at 7 days, 14 days, 30 days, 60 days, and 90 days. Active pharmaceutical ingredients quantification was performed by high-performance liquid chromatography, via a stability-indicating method. The following oral suspensions compounded using SyrSpend SF PH4 as the vehicle showed a beyond-use date of 90 days when stored both at room or refrigerated temperatures: clonidine hydrochloride 0.1 mg/mL, ethambutol hydrochloride 50 mg/mL and 100 mg/mL, griseofulvin 25 mg/mL, nitrofurantoin 10 mg/mL, and thioguanine 2.5 mg/mL, all compounded from the active pharmaceutical ingredients in powder form. Suspensions compounded using the active pharmaceutical ingredients from tablets presented a lower beyond-use date: 30 days for ethambutol hydrochloride 50 mg/mL and hydralazine hydrochloride 4 mg/mL, stored at both temperatures, and for clopidogrel bisulfate 5 mg/mL when stored only at refrigerated temperature. Azathioprine suspensions showed a beyond-use date of 14 days when compounded using active pharmaceutical ingredients in powder form at both temperatures. This suggests that SyrSpend SF PH4 is suitable for compounding active pharmaceutical ingredients from different pharmacological classes.
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