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Effect of SR 59026A, a new 5‐HT1A receptor agonist, on sexual activity in male rats

The effect of SR 59026A, a new selective 5-HT1A receptor agonist, was evaluated on sexual behaviour of male rats in different experimental conditions. SR S9026A (1–10 mg/kg p.o.) stimulated the copulatory behaviour of sexually experienced rats, as evidenced by a decrease in the number of pre-ejaculatory mounts and intromissions and a shortening of the ejaculation latency. SR 59026A also facilitated the sexual behaviour of naive male rats characterized by a low level of sexual performance: over the same dose range, the percentage of naive males that copulated was significantly increased and the ejaculation latency reduced. In experiments designed to evaluate the onset of sexual satiation, SR 59026A (1 and 3 mg/kg) increased significantly the number of ejaculations and delayed the time of sexual satiation, finally, in agreement with studies on other 5-HT1A receptor agonists, SR 59026A did not modify the occurrence of spontaneous erections in isolated male rats. Therefore, the present study shows that SR S9026A improves the sexual performance of male rats in a number of different experimental models, and the compound may prove to be of interest for the treatment of certain states of human male sexual dysfunction.