Endogenous catecholamines-ep i nephr i ne 【adverse effects】 ® disturbing reactions such as restless, throbbing headache,tremor and palpitations ser ious reaction include cerebral hemorrhage and cardiac arrhythmiasEndogenous catecholamines-- epinephrine 【 【 adverse effects】 disturbing reactions such as restless, throbbing headache, tremor and palpitations serious reaction include cerebral hemorrhage and cardiac arrhythmias