AM-125 for treatment of vertigo
Auris Medical is developing AM-125, an intranasal formulation of betahistine, for the treatment of vertigo. The intranasal delivery of AM-125 is intended to bypass the effects of first-pass metabolism found with oral delivery of betahistine. This is expected to offer significant additional benefits in terms of efficacy and tolerability.
Oral betahistine is approved for use in about 115 countries worldwide, but not in the United States.
How AM-125 works
Betahistine is a small molecule drug that acts as a partial histamine H1-receptor agonist and a H3-receptor antagonist. The compound has demonstrated increased cochlear, vestibular and cerebral blood flow, vestibular compensation and the ability to inhibit neuronal firing in the vestibular nuclei. In the case of vertigo, the objective is to restore balance.
In a previous Phase 1 trial, intranasal betahistine demonstrated good tolerance and significantly higher plasma concentrations in comparison with oral betahistine.
Auris Medical initiated a second Phase 1 trial of AM-125 in the first quarter of 2018.