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Polyol sugars, displaying a plurality of hydroxyl groups, were shown to modulate tetrahydroxyborate (borate) cross-linking in lidocaine hydrochloride containing poly(vinyl alcohol) semi-solid hydrogels. Without polyol, demixing of borate cross-linked PVA hydrogels into two distinct phases was noticeable upon lidocaine hydrochloride addition, preventing further use as a topical system. d-Mannitol incorporation...
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