Bisoprolol must not be used in patients with: Acute heart failure or during episodes of heart failure decomposition requiring intravenous therapy with substances increasing the contractility of the heart; shock induced by disorders of cardiac function (cardiogenic shock); severe disturbances of atrioventricular conduction (second or third degree AV block) without a pacemaker; sick sinus syndrome; sinoatrial block; slowed heart rate, causing symptoms (symptomatic bradycardia); decreased blood pressure, causing symptoms (symptomatic hypotension); severe bronchial asthma or severe chronic obstructive pulmonary disease; severe forms of peripheral arterial occlusive disease or Raynaud syndrome; untreated tumors of the adrenal gland (pheochromocytoma); metabolic acidosis; hypersensitivity to bisoprolol or to any of the excipients.