Common side effects of captopril may include:
Cough;
flushing (warmth, redness, or tingly feeling);
numbness, tingling, or burning pain in your hands or feet;
loss of taste sensation; or
mild skin itching or rash.
Serious side effects of captopril may include:
a light-headed feeling, like you might pass out;
little or no urination, or urinating more than usual;
shortness of breath (even with mild exertion), swelling, rapid weight gain;
chest pain or pressure, pounding heartbeats or fluttering in your chest;
Signs to watch for
High potassium: nausea, slow or unusual heart rate, weakness, loss of movement
Allergic reaction: hives; severe stomach pain; difficulty breathing; swelling of your face, lips, tongue, or throat.