Pharmacology: Bisoprolol hemifumarate is the most selective β1-blocker. It has highest level of affinity for the β1-receptor than any other β-blocker. It selectively blocks β1-adrenergic receptor in the heart and vascular smooth muscle and reduces heart rate and cardiac output resulting in decrease of arterial hypertension. Lipid metabolism can be adversely affected by β1-blockers, in patients with non-selective blocker, but Bisoprolol does not cause any change in the cholesterol fraction including the cardioprotective high-density lipoprotein (HDL) cholesterol in long-term therapy.