ChEBI: 10H-phenothiazine is the 10H-tautomer of phenothiazine. It has a role as a plant metabolite. It is a tautomer of a 4aH-phenothiazine, a 1H-phenothiazine and a 3H-phenothiazine.NCI Thesaurus (NCIt): Phenothiazine is a class of agents exhibiting antiemetic, antipsychotic, antihistaminic, and anticholinergic activities. Phenothiazines antagonize the dopamine D2-receptor in the chemoreceptor trigger zone (CTZ) of the brain, potentially preventing chemotherapy-induced emesis. In addition, these agents have peripherally or centrally antagonistic activity against alpha adrenergic, serotonergic, histaminic, and muscarinic receptors. (NCI)