Vestibular nuclei (H1, mACh: Hyoscine)
Nucleus of the solitary tract (H1, mACh: Hyoscine)
CTZ (NK1: Aprepitant, D2: Metoclopramide, 5HT3)
GIT visceral afferents (5-HT3: Ondansetron, palonosetron)
Vomiting centre (mACh: Hyoscine)
(Everything has mACh except for CTZ: NK1, D2, 5HT3, GIT: 5-HT3)
H1/mACh: Diphenhydramine (Vestibular nuclei, Vomiting centre, Nucleus of the solitary tract)
D2, mACh, H1: prochlorperazine,promethazine (Vestibular nuclei, Vomiting centre, Nucleus of the solitary tract)
D2: Droperidol, olanzapine (CTZ)