Differential effects of selective PDE5 inhibitors in rat cerebral arteries in vitro and in vivo
Abstract
Compounds which increase cGMP levels are implicated in migraine pathophysiology as well as stroke recovery. Inhibitors of the cGMP degrading enzyme phosphodiesterase type 5 (PDE5) induce headache and migraine in humans, however surprisingly and unlike other migraine inducing drugs without measurable dilatation of cerebral arteries [1] or changes in hemodynamic response or excitability [2]. We aimed to investigate whether sildenafil and tadalafil induced dilatation of rat middle cerebral and meningeal arteries in vitro and in vivo.
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