it was more effective on infusion into the fourth ventricle than on injection into a lateral ventricle and was approximately half as potent as morphine in provoking hyperglycaemia.3 codeine produced no hyperglycaemia in doses of 0.75 and 1.5 mg.4 pethidine had a weak hyperglycaemic action in doses of 0.75 and 1.5 mg , but the effect was not regularly obtained .
C0026549
morphine
C0009214
codeine