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Metoprolol, sold under the brand name Lopressor among others, is a medication used to treat angina, high blood pressure and a number of conditions involving an abnormally fast heart rate. [4] It is also used to prevent further heart problems after myocardial infarction and to prevent headaches in those with migraines . [ 4 ]
Group of pharmaceuticals that are used to suppress abnormally fast rhythms (tachycardias), such as atrial fibrillation, supraventricular tachycardia and ventricular tachycardia. Type I ( sodium channel blockers)
During long-term use, labetalol can reduce heart rate during exercise while maintaining cardiac output by an increase in stroke volume. [24] Labetalol possesses significant intrinsic sympathomimetic activity (ISA). [2] [22] In particular, it is a partial agonist at β 2-adrenergic receptors located in the vascular smooth muscle.
Tachycardia secondary to peripheral vasodilation and cardiac stimulation (Such tachycardia may be accompanied by palpitations.) [4] Tremor, excessive sweating, anxiety, insomnia, and agitation [5] More severe effects include paradoxical bronchospasm, hypokalemia, and in rare cases a myocardial infarction. [4]
Antiarrhythmic agents, also known as cardiac dysrhythmia medications, are a class of drugs that are used to suppress abnormally fast rhythms (tachycardias), such as atrial fibrillation, supraventricular tachycardia and ventricular tachycardia.
The mixed alpha-and beta blocker labetalol is especially useful for treatment of concomitant tachycardia and hypertension induced by methamphetamine. [51] The phenomenon of "unopposed alpha stimulation" has not been reported with the use of beta blockers for treatment of methamphetamine toxicity. [51]