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Tamsulosin is a selective α 1 receptor antagonist that has preferential selectivity for the α 1A receptor in the prostate versus the α 1B receptor in the blood vessels. [ 25 ] When alpha 1 receptors in the bladder neck, prostate, ureter, and urethra are blocked, a relaxation in smooth muscle tissue results. [ 16 ]
During this metabolism, drug is lost during the process of absorption which is generally related to the liver and gut wall. The liver is the major site of first pass effect; however, it can also occur in the lungs, vasculature or other metabolically active tissues in the body.
The drug is extensively metabolized in the liver by CYP3A4. [1] ... but also in combination with tamsulosin under the brand names Combodart, Duodart, and Jalyn. [71]
Drug metabolism is the metabolic breakdown of drugs by living organisms, usually through specialized enzymatic systems. More generally, xenobiotic metabolism (from the Greek xenos "stranger" and biotic "related to living beings") is the set of metabolic pathways that modify the chemical structure of xenobiotics, which are compounds foreign to an organism's normal biochemistry, such as any drug ...
The human body uses glucuronidation to make a large variety of substances more water-soluble, and, in this way, allow for their subsequent elimination from the body through urine or feces (via bile from the liver). Hormones are glucuronidated to allow for easier transport around the body. Pharmacologists have linked drugs to glucuronic acid to ...
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.
Finasteride is extensively metabolized in the liver, first by hydroxylation via CYP3A4 and then by aldehyde dehydrogenase. [5] It has two major metabolites, which are the tert-butyl side chain monohydroxylated and monocarboxylic acid metabolites. [5] These metabolites show approximately 20% of the inhibitory activity of finasteride on 5α ...
Cirrhosis, also known as liver cirrhosis or hepatic cirrhosis, chronic liver failure or chronic hepatic failure and end-stage liver disease, is a condition of the liver in which the normal functioning tissue, or parenchyma, is replaced with scar tissue and regenerative nodules as a result of chronic liver disease.