The effect of alinidine (St 567) on emotionally induced tachycardia in man.

Experiments were performed in a randomized double-blind cross-over study in 6 healthy volunteers to answer the question if alinidine, a new analogue of clonidine with a bradycardic effect directly on the sinus node, would have an effect on an emotionally-induced tachycardia. Alinidine 40 mg orally significantly (1%) reduced the tachycardia and the concomitant rise in diastolic blood pressure during the stress of performing a mental task. Forearm blood flow and the efficiency (total score in the mental task) remained unchanged by alinidine.