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The narrowing of blood vessels leads to an increase in peripheral resistance, thereby elevating blood pressure. While vasoconstriction is a normal and essential regulatory mechanism for maintaining blood pressure and redistributing blood flow during various physiological processes, its dysregulation can contribute to pathological conditions.
First-generation antihistamines can easily cross the blood-brain barrier into the central nervous system to reach the H-1 receptors within, often causing drowsiness. [7] Second-generation antihistamines selectively bind to the peripheral H-1 receptors outside the blood-brain barrier, therefore they are less likely to cause sedation.
Decongestants can be absorbed from the nose via an inhaler and produce systemic effects, mainly central nervous system stimulation and rise in blood pressure. These drugs should be used cautiously in hypertensives and in those receiving monoamine oxidase inhibitors (MAOIs), as they can cause hypertensive crisis.
There has been concern that pseudoephedrine may likewise dangerously increase blood pressure and thereby increase the risk of stroke, whereas others have contended that the risks are exaggerated. [ 1 ] [ 22 ] Besides hemorrhagic stroke, myocardial infarction , coronary vasospasm , and sudden death have also rarely been reported with ...
Processed Foods Raise Blood Pressure. Yes, many ultra-processed foods (think doughnuts, candies and hot dogs) are not the best choices for our health. However, there are a surprising number of ...
Phenylephrine, sold under the brand names Neosynephrine and Sudafed PE among others, is a medication used as a decongestant for uncomplicated nasal congestion in the form of a nasal spray or oral tablet, [5] to dilate the pupil, to increase blood pressure given intravenously in cases of low blood pressure, and to relieve hemorrhoids as a suppository.
Any medication can cause an allergic reaction, says Dr. Zalvan, but some medications can cause them more often, such as ACE inhibitors (a blood pressure medication).
Diphenhydramine is a potent antimuscarinic (a competitive antagonist of muscarinic acetylcholine receptors) and, as such, at high doses can cause anticholinergic syndrome. [68] The utility of diphenhydramine as an antiparkinson agent is the result of its blocking properties on the muscarinic acetylcholine receptors in the brain.