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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 ]
Labetalol was the first drug created that combined both α- and β-adrenergic receptor blocking properties. It was created to potentially fix the compensatory reflex issue that occurred when blocking a single receptor subtype, i.e. vasoconstriction after blocking β-adrenergic receptors or tachycardia after blocking α-adrenergic receptors.
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) Type Ia Ajmaline; Procainamide; Quinidine; Type Ib Lidocaine; Phenytoin; Type Ic Encainide; Flecainide; Propafenone; Type II (beta ...
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]
The progress in β-blocker development led to the introduction of drugs with variety of properties. β-blockers were developed having a relative selectivity for cardiac β1-receptors (for example metoprolol and atenolol), partial adrenergic agonist activity , concomitant α-adrenergic blocking activity (for example labetalol and carvedilol) and ...
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 first-dose reaction can also result in tachycardia and orthostatic hypotension, which is characterised by a feeling of extreme dizziness that gets worse with an upright posture. [1] Intravascular volume reduction , or concomitant use of other antihypertensive drugs can also lead to reflex tachycardia and orthostatic hypotension .
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]