The following adverse reactions have been observed, but there are not enough data to support an estimate of their frequency.
Cardiovascular System
ventricular arrhythmia (at very high doses)
ectopic beats
tachycardia
anginal pain
palpitation
cardiac conduction abnormalities
widened QRS complex
bradycardia
hypotension
hypertension
vasoconstriction
Respiratory System
dyspnea
Gastrointestinal System
nausea
vomiting
Metabolic/Nutritional System
azotemia
Central Nervous System
headache
anxiety
Dermatological System
piloerection
Other
Gangrene of the extremities has occurred when moderate to high doses were administered for prolonged periods or in patients with occlusive vascular disease receiving low doses of dopamine (dopamine hydrochloride) HCl.
A few cases of peripheral cyanosis have been reported.