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The adverse effects of non-selective alpha blockers are caused by the autonomic response to the systemic changes induced by the adrenergic blocking agents. [3] The common adverse effects of alpha blockers are due to the blockade of alpha-1 adrenergic receptors in tissue that requires high level of alpha adrenergic sympathetic input such as ...
However, some side effects can occur, such as palpitation, tremor, elevated blood pressure, and anxiety. [23] Yohimbe bark contains both α 1 and α 2 adrenergic receptors blocking alkaloids . Phentolamine , a non-selective alpha blocker, has also been tested to treat erectile dysfunction.
While adrenergic antagonists have been used for years, there are multiple issues with using this class of drug. When overused, adrenergic antagonists can result in bradycardia, hypotension, hyperglycemia and even hypodynamic shock. This is because adrenergic stimulation by agonists results in normal calcium channel regulation. If these ...
Regarding non-cardiac side effects, they can cause nausea, headache, fatigue, dry mouth, and dry eyes. [4] In rare cases, confusion , memory loss , and sexual dysfunction are reported. [ 12 ] Additionally, beta 1 blockers can mask hypoglycaemia-induced tachycardia in diabetic patients, potentially leading to hypoglycaemic unawareness and ...
The mechanisms of sympathomimetic drugs can be direct-acting (direct interaction between drug and receptor), such as α-adrenergic agonists, β-adrenergic agonists, and dopaminergic agonists; or indirect-acting (interaction not between drug and receptor), such as MAOIs, COMT inhibitors, release stimulants, and reuptake inhibitors that increase the levels of endogenous catecholamines.
Alpha-1 blockers (also called alpha-adrenergic blocking agents or alpha-1 antagonists) constitute a variety of drugs that block the effect of catecholamines on alpha-1-adrenergic receptors. They are mainly used to treat benign prostatic hyperplasia (BPH), hypertension and post-traumatic stress disorder . [ 1 ]
Adverse effects associated with β 2-adrenergic receptor antagonist activity (bronchospasm, peripheral vasoconstriction, alteration of glucose and lipid metabolism) are less common with β 1-selective (often termed "cardioselective") agents, but receptor selectivity diminishes at higher doses.
Norepinephrine Epinephrine. A norepinephrine reuptake inhibitor (NRI, NERI) or noradrenaline reuptake inhibitor or adrenergic reuptake inhibitor (ARI), is a type of drug that acts as a reuptake inhibitor for the neurotransmitters norepinephrine (noradrenaline) and epinephrine (adrenaline) by blocking the action of the norepinephrine transporter (NET).