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Atenolol is available in the form of 25, 50, and 100 mg oral tablets. [21] [4] It is also available in the form of oral tablets containing a combination of 50 or 100 mg atenolol and 50 mg chlortalidone. [21] Atenolol was previously available in a 0.5 mg/mL solution for injection as well, but this formulation was discontinued. [21]
Metoprolol is a beta blocker, or an antagonist of the β-adrenergic receptors. It is specifically a selective antagonist of the β 1-adrenergic receptor and has no intrinsic sympathomimetic activity. [37] Metoprolol exerts its effects by blocking the action of certain neurotransmitters, specifically adrenaline and noradrenaline.
Selective beta 1 blockers have been shown to have an array of cardiac common side effects, comprising bradycardia, reduced exercise tolerance, hypotension, atrioventricular block, and heart failure. [4] Regarding non-cardiac side effects, they can cause nausea, headache, fatigue, dry mouth, and dry eyes. [4]
Beta blockers vary in their lipophilicity (fat solubility) and in turn in their ability to cross the blood–brain barrier and exert effects in the central nervous system. [76] Beta blockers with greater blood–brain barrier permeability can have both neuropsychiatric therapeutic benefits and side effects, as well as adverse cognitive effects ...
The combination of beta blockers and antihypertensive drugs will work on different mechanism to lower blood pressure. [17] For example, the co-administration of beta-1 blocker atenolol and ACE inhibitor lisinopril could produce a 50% larger reduction in blood pressure than using either drug alone. [18]
Atenolol/chlorthalidone, also known as co-tenidone, is a combination medication used to treat high blood pressure. [2] [3] It is made up of atenolol, a beta-blocker and chlortalidone, a diuretic. [4] It is not recommended as an initial treatment but may be used in those who are taking atenolol and chlortalidone individually. [5] It is taken by ...
Adrenergic competitive antagonists are shorter lasting than the other two types of antagonists. While the antagonists for alpha and beta receptors are usually different compounds, there has been recent drug development that effects both types of the adrenoreceptors. Phentolamine, an adrenergic antagonist
This is also the case for Tamsulosin and it may be assumed that the others alpha-1 blockers work in a similar manner, since Tamsulosin is an alpha-1-a blocker and Prazosin is an alpha-1 blocker. [30] The risk for floppy iris syndrome during cataract surgery is elevated when the patient is using an alpha-1 blocker.
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