Beta (β) blockers
(Beta-adrenergic antagonists) Inotropic drugs which block the affect of Adrenaline on the heart and blood vessels, weaken effects of the Sympathetic Nervous System on heart conductivity, and reduce blood pressure and heart rate. Used in the management of cardiac arrhythmias, myocardial infarctions, and hypertension.
Example conditions/agents:
Cardiac arrhythmiaEsmolol, Sotalol
Congestive heart failureBisoprolol, Carteolol
HypertensionAtenolol, Esmolol, Labetalol
Myocardial infarctionAtenolol, Metoprolol
Esmolol has short duration of action, and can be useful in preventing hypertension and tachycardia following intubation.

Caution: Beta-blockers can cause bronchospasm in asthmatic patients.