pretreatment ( 30 min ) with the gastric acid inhibitors cimetidine , ranitidine ( h2 receptor antagonists , 4 mg/kg and 1 mg/kg respectively ) or omeprazole ( h+-k+ atpase inhibitor , 1.6 mg/kg ) prolonged the elevation of gastrin levels occurring in response to an administration of apomorphine .
C0008783
cimetidine
C2757005
h2 receptor