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Use of Sorbitol as Pharmaceutical Excipient in the Present Day Formulations - Issues and Challenges for Drug Absorption and Bioavailability.
Drug Development and Industrial Pharmacy 2019 July 5
Sorbitol is a popular sugar alcohol which has been used as an excipient in formulations of various drugs. Although from a safety perspective the presence of sorbitol in drug formulations does not raise a concern, reports have emerged and these suggest that sorbitol in drug formulations may alter oral absorption and bioavailability of certain drugs. The focus of this paper was to review the published literature of various drugs where pharmacokinetic data has been reported for the drug alone versus drug administered with sorbitol and provide perspectives on the pharmacokinetic findings. Interestingly, for BCS class I drugs such as theophylline, metoprolol, the oral absorption and bioavailability were generally not affected by sorbitol. For another BCS class I drug, theophylline, oral absorption and bioavailability were decreased when sustained release formulation was used in place of immediate release formulation. For drugs such as risperidone (BCS class II) and lamivudine and ranitidine (BCS class III), the solution formulations showed diminished oral bioavailability in presence of sorbitol, whereas cimetidine and acyclovir (BCS class III), did not show any changes in pharmacokinetic profiles due to sorbitol. Finally, the presence of activated charcoal with sorbitol showed different pharmacokinetic outcome for BCS class I and III drugs.
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