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Tamsulosin: Flomax A blocker that has slight selectivity for α 1 receptors. [2] Relaxation of prostatic smooth muscle. [2] Benign prostatic hyperplasia [2] [11] Orthostatic hypotension [2] Yohimbine: Yocon Blocks α 2 receptor, and increases norepinephrine release, thus increasing CNS activity. [2] Raises blood pressure and heart rate. [2 ...
Tamsulosin, sold under the brand names including Flomax and Contiflo, is a medication used to treat symptomatic benign prostatic hyperplasia (BPH) and chronic prostatitis and to help with the passage of kidney stones. [6] [7] [8] The evidence for benefit with a kidney stone is better when the stone is larger. [8] Tamsulosin is taken by mouth. [6]
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.
Alpha-1 blockers such as alfuzosin, doxazosin, tamsulosin, and silodosin involve CYP450 enzyme metabolism, particularly by CYP3A4. [14] Alpha-1 blockers will conjugate in glucuronidation during metabolism. CYP3A4 inhibitors inhibit glucuronidation and hence reduce the glucuronide-conjugated metabolite. [15]
They work by inhibiting the synthesis, release, or reuptake of the neurotransmitters or by antagonising the receptors on postsynaptic neurones. Their medical uses, mechanisms of action, adverse effects, and contraindications depend on the specific types of adrenergic blockers used, including alpha 1, alpha 2, beta 1, and beta 2.
For example, the British National Formulary uses the cautions versus contraindications pair, and various U.S. CDC webpages use precautions versus contraindications. The logic of the latter two styles is the idea that readers must never be confused: the word contraindication in that usage always is meant in its absolute sense , providing ...
According to European labels, silodosin has no contraindications apart from known hypersensitivity. [ 8 ] [ 7 ] Another source names recurring urinary retention , recurring urinary infections, uncontrolled macro hematuria , bladder stones , hydronephrosis , combination with other α 1 -antagonists or dopamine agonists , and severe renal or ...
Alpha-2 blockers (or α 2 blockers) are a subset of the alpha blocker class of drugs and are antagonists to the α 2 adrenergic receptor.They are mainly used in research, having found limited clinical application in human medicine.