| Item |
Information |
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Drug Groups
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approved |
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Description
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A muscarinic antagonist that has effects in both the central and peripheral nervous systems. It has been used in the treatment of arteriosclerotic, idiopathic, and postencephalitic parkinsonism. It has also been used to alleviate extrapyramidal symptoms induced by phenothiazine derivatives and reserpine. [PubChem] |
| Indication |
For use as an adjunct in the therapy of all forms of parkinsonism and control of extrapyramidal disorders secondary to neuroleptic drug therapy. |
| Pharmacology |
Biperiden is a weak peripheral anticholinergic agent. It has, therefore, some antisecretory, antispasmodic and mydriatic effects. In addition, biperiden possesses nicotinolytic activity. The parenteral form of biperiden is an effective and reliable agent for the treatment of acute episodes of extrapyramidal disturbances sometimes seen during treatment with neuroleptic agents. Akathisia, akinesia, dyskinetic tremors, rigor, oculogyric crisis, spasmodic torticollis, and profuse sweating are markedly reduced or eliminated. With parenteral biperiden, these drug-induced disturbances are rapidly brought under control. |
| Toxicity |
LD50=760 mg/kg (Orally in rats). Signs of overdose include dilated and sluggish pupils, warm, dry skin, facial flushing, decreased secretions of the mouth, pharynx, nose, and bronchi, foul-smelling breath, elevated temperature, tachycardia, cardiac arrhythmias, decreased bowel sounds, urinary retention, delirium, disorientation, anxiety, hallucinations, illusions, confusion, incoherence, agitation, hyperactivity, ataxia, loss of memory, paranoia, combativeness, and seizures. |
| Affected Organisms |
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Humans and other mammals |
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| Biotransformation |
The metabolism of biperiden is not completely understood, but does involve hydroxylation. |
| Absorption |
87% bioavailability |
| Protein Binding |
60% |
| References |
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Nishiyama K, Mizuno T, Sakuta M, Kurisaki H: Chronic dementia in Parkinson's disease treated by anticholinergic agents. Neuropsychological and neuroradiological examination. Adv Neurol. 1993;60:479-83.
[Pubmed]
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