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What is B-blockers?
medicines that lower blood pressure. They also may be called beta-adrenergic blocking agents. The medicines block the effects of the hormone epinephrine, also known as adrenaline.
Uses of B-blockers
Beta-blockers are indicated and have FDA approval for the treatment of tachycardia, hypertension, myocardial infarction, congestive heart failure, cardiac arrhythmias, coronary artery disease, hyperthyroidism, essential tremor, aortic dissection, portal hypertension, glaucoma, migraine prophylaxis, and other conditions .
Mechanism of action
block the effects of the hormone epinephrine, also known as adrenaline. Beta blockers cause the heart to beat more slowly and with less force. This lowers blood pressure. Beta blockers also help widen veins and arteries to improve blood flow.
Side effects of beta blockers
feeling tired, dizzy or lightheaded (these can be signs of a slow heart rate)
cold fingers or toes (beta blockers may affect the blood supply to your hands and feet)
difficulties sleeping or nightmares.
difficulty getting an erection or other difficulties with sex.
feeling sick.
Examples
Bisoprolol
Nebivolol
Metoprolo
Carvidelol
Atenolol
Propranolol
Contraindications
peripheral vascular diseases, diabetes mellitus, chronic obstructive pulmonary disease (COPD) and asthma.
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