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Prazosin was a much better tolerated drug than phenoxybenzamine but the problem still remained that it lowered the blood pressure more than desired for a BPH treatment. [2] [8] Terazosin was the first long-lasting alpha 1 blocker approved by FDA to treat BPH. Doxazosin and Tamsulosin were approved after.
Tamsulosin is taken by mouth. [6] Common side effects include dizziness, headache, insomnia, nausea, blurry vision, and sexual problems. [9] [6] Other side effects may include feeling lightheaded with standing due to changes in blood pressure, and angioedema. [9] Tamsulosin is an alpha blocker and works by relaxing muscles in the prostate. [10]
Common examples of alpha 1 blockers are Tamsulosin, Prazosin, Phentolamine, and Phenoxybenzamine. [1] Each agent has its own off-label uses, some examples include Tamsulosin for urinary disorders, Prazosin for post-traumatic stress disorder -related nightmares and Raynaud phenomenon , Phentolamine for hypertensive crisis and extravasation of ...
For instance, alpha blockers that are used for the reduction of blood pressure, such as phenoxybenzamine or phentolamine can have synergy with other drugs that affect smooth muscle, blood vessels, or drugs used for erectile dysfunction (i.e. sildenafil, tamsulosin, etc.).
Doxazosin, sold under the brand name Cardura among others, is a medication used to treat symptoms of benign prostatic hyperplasia (enlarged prostate), hypertension (high blood pressure), and post-traumatic stress disorder (PTSD). [1] [2] For high blood pressure, it is a less preferred option. [2] It is taken by mouth. [2]
Tamsulosin and silodosin are selective α1 receptor blockers that preferentially bind to the α1A receptor in the prostate instead of the α1B receptor in the blood vessels. Less-selective α1 receptor blockers such as terazosin and doxazosin may lower blood pressure.
The adrenergic antagonists are widely used for lowering blood pressure and relieving hypertension. [16] These antagonists have a been proven to relieve the pain caused by myocardial infarction, and also the infarction size, which correlates with heart rate. [17] There are few non-cardiovascular uses for adrenergic antagonists.
This postural hypotension usually happens shortly after the first dose is absorbed into the blood and can result in syncope (fainting). Syncope occurs in approximately 1% of patients given an initial dose of 2 mg prazosin or greater. This adverse effect is self-limiting and in most cases does not recur after the initial period of therapy or ...