Exaprolol is a non-selective antagonist at beta-adrenoceptors exerting antiarrhythmic and local anesthetic activity. It inhibits the inotropic and chronotropic responses. Exaprolol liberates histamine from isolated mast cells and decreases the uptake of extracellular histamine. It acts on mast cells due to the direct and indirect ion exchange mechanism resulted in disproportion between histamine and granule liberation.

Exaprolol is a non-selective antagonist at beta-adrenoceptors exerting antiarrhythmic and local anesthetic activity. It inhibits the inotropic and chronotropic responses. Exaprolol liberates histamine from isolated mast cells and decreases the uptake of extracellular histamine. It acts on mast cells due to the direct and indirect ion exchange mechanism resulted in disproportion between histamine and granule liberation.