Viloxazine, like imipramine, inhibited norepinephrine reuptake in the hearts of rats and mice; unlike imipramine, it did not block reuptake of norepinephrine in either the medullae or the hypothalami of rats. As for serotonin, while its reuptake inhibition was comparable to that of desipramine (i.e., very weak), viloxazine did potentiate serotonin-mediated brain functions in a manner similar to amitriptyline and imipramine, which are relatively potent inhibitors of serotonin reuptake.[11] Unlike any of the other drugs tested, it did not exhibit any anticholinergic effects.[11]