<p>Labetalol is contraindicated for patients known to have hypersensitivity to the medicine. Labetalol is contraindicated in second or third degree heart block, infranodal A-V block, uncontrolled heart failure, sick-sinus syndrome, cardiogenic shock and other conditions associated with severe and prolonged hypotension or severe bradycardia, and bronchial asthma or other obstructive lung disorders.</p>