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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.
Phenylephrine is an oral medication primarily used as a decongestant. [5] [6] It is a selective α 1-adrenergic receptor activator which results in the constriction of both arteries and veins. [5] Common side effects include nausea, headache, and anxiety. [5] Phenylephrine was patented in 1927 and came into medical use in 1938. [7]
The popular drug phenylephrine is not effective at relieving congestion and works no better than a placebo pill, according to FDA experts. (Photo Illustration: Yahoo News; photos: Getty Images)
Do over-the-counter decongestants like Sudafed PE work? Doctors have said oral phenylephrine is ineffective to relieve nasal congestion. An FDA panel will reevaluate the evidence.
On Nov. 7, the Food and Drug administration announced a proposal to remove oral phenylephrine — a decongestant found in products by brands including Sudafed PE, Vicks DayQuil and Theraflu ...
Patients taking MAO inhibitors can experience a severe hypertensive crisis if given a sympathomimetic drug such as naphazoline HCl; Drug interactions can occur with anaesthetics that sensitize the myocardium to sympathomimetics (e.g. cyclopropane or halothane cautiously) Exercise caution when applying prior to use of phenylephrine.
The agency has not issued a final decision regarding phenylephrine and has not asked manufacturers or retail pharmacies to remove products containing the ingredient from store shelves.
A 2007 Cochrane review assessed the side effects of short-term use of pseudoephedrine at recommended doses as a nasal decongestant. [21] It found that pseudoephedrine had a small risk of insomnia and this was the only side effect that occurred at rates significantly different from placebo. [ 21 ]