alexa Haloperidol-loaded polysorbate-coated polymeric nanocapsules increase its efficacy in the antipsychotic treatment in rats.
Materials Science

Materials Science

Journal of Nanomedicine & Nanotechnology

Author(s): Benvegn DM, Barcelos RC, Boufleur N, Reckziegel P, Pase CS,

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Abstract Haloperidol is an antipsychotic drug associated with the development of movement disorders. We evaluated the effect of its nanoencapsulation on its pharmacological activity and motor side effects. Haloperidol-loaded polysorbate-coated nanocapsules (H-NC) showed nanometric size, negative zeta potential and low polydispersity indices and high encapsulation efficiency (>95\%). Rats received a single dose of H-NC (0.2mg/kg ip) and four doses of D,L-amphetamine, AMPH (8.0mg/kg ip), injected every 3h (0, 3, 6 and 9h). The AMPH-induced stereotyped movements were quantified in the intervals of 15 min after each of four doses of AMPH, demonstrating greater pharmacological efficacy of the H-NC over free haloperidol (FH). The acute motor side effects were evaluated 1h after a single dose of H-NC or its free solution (0.2mg/kg ip). The group treated with H-NC presented lower extrapyramidal effects (catalepsy and oral dyskinesia) than those treated with FH. In the last experimental set, rats sub-chronically treated with a daily dose of H-NC (0.2mg/kg ip) for 28 days showed a lower incidence of extrapyramidal effects than those treated with the free drug (0.2mg/kg ip). Our findings showed the potential of using H-NC in the development of a nanomedicine aimed at increasing the efficacy of this antipsychotic drug and reducing its side effects. Copyright © 2010 Elsevier B.V. All rights reserved. This article was published in Eur J Pharm Biopharm and referenced in Journal of Nanomedicine & Nanotechnology

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