Key result
Astemizole at 30 mg/kg induced premature ventricular contractions in all dogs and torsade de pointes in 1 of 4, indicating its proarrhythmic dose is lower than its proposed anti-cancer dose.
Why the study?
Does astemizole induce proarrhythmic effects at doses lower than its proposed anti-cancer dose in an atrioventricular block canine model?
Does astemizole induce proarrhythmic effects at doses lower than its proposed anti-cancer dose in an atrioventricular block canine model?
Astemizole exhibits significant proarrhythmic effects at doses lower than those required for its proposed anti-cancer efficacy, limiting its viability for repurposing.
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May caution against astemizole repurposing for cancer; leaves open translation of proarrhythmic effects from this canine model.
Izumi‐Nakaseko et al. (2016) studied chronic atrioventricular block (canine model). Astemizole was evaluated on proarrhythmic potential. Astemizole at 30 mg/kg induced premature ventricular contractions in all dogs and torsade de pointes in 1 of 4, indicating its proarrhythmic dose is lower than its proposed anti-cancer dose.
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