Also available in 1 mL, 5 mg, 10 mg, 50 mg, 100 mg and bulk. Please contact Fisher for quotes. Clozapine N-oxide dihydrochloride, a derivative of Clozapine and an agonist of human muscarinic design receptors (DREADDs), crosses the blood-brain barrier and activates DREADD receptors hM3Dq and hM4Di. Purity 98.11%