Setastine (Loderix) is a potent antagonist of histamine H1-receptor mediated responses. Setastine inhibits anaphylactic shock in guinea-pigs sensitized by horse serum. No antiserotonin, anticholinergic and antiadrenergic effect of the compound can be detected. Setastine has a long lasting (up to 16 h) antihistamine effect with a good oral effectiveness. It shows no cardiovascular effects in cats. Setastine shows a much weaker CNS depressant activity than clemestine fumarate. In displacement studies (3H-mepyramine) setastine had significantly weaker affinity for the central nervous system (CNS) H1-receptors than clemastine fumarate. It is concluded that setastine is a non-sedative highly active H1-antagonist.

Setastine (Loderix) is a potent antagonist of histamine H1-receptor mediated responses. Setastine inhibits anaphylactic shock in guinea-pigs sensitized by horse serum. No antiserotonin, anticholinergic and antiadrenergic effect of the compound can be detected. Setastine has a long lasting (up to 16 h) antihistamine effect with a good oral effectiveness. It shows no cardiovascular effects in cats. Setastine shows a much weaker CNS depressant activity than clemestine fumarate. In displacement studies (3H-mepyramine) setastine had significantly weaker affinity for the central nervous system (CNS) H1-receptors than clemastine fumarate. It is concluded that setastine is a non-sedative highly active H1-antagonist.