are you taking cardace 125 mg or 12.5mg. And your symptoms suggest some may be because of hypotension because cardace ( ACEI) can cause first dose hypotension , postural hypotension
and other symptoms like headache and dizziness
. But these symptoms you don't stop it because cardace has so many beneficial effects on heart.
so consult your doctor and reduce the dose if needed and gradually increase the dose .