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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.
Besides hypertension, common side-effects include sleeplessness, anxiety, dizziness, excitability, and nervousness. Topical nasal or ophthalmic decongestants quickly develop tachyphylaxis (a rapid decrease in the response to a drug after repeated doses over a short period of time). Long-term use is not recommended since these agents lose ...
Sympathomimetic drugs are used to treat cardiac arrest and low blood pressure, or even delay premature labor, among other things. These drugs can act through several mechanisms, such as directly activating postsynaptic receptors, blocking breakdown and reuptake of certain neurotransmitters, or stimulating production and release of catecholamines.
Phenylephrine is found in a wide range of cold and flu medications, including Sudafed PE, Benadryl Allergy D Plus Sinus and Vicks DayQuil Cold and Flu Relief. Here’s what experts say are ...
Does phenylephrine work? Doctors explain how to choose between cold medicines like Dayquil and Sudafed PE for congestion, runny nose, and other symptoms. This Popular Cold Medicine Doesn't Work ...
Phenylephrine, a popular ingredient in many over-the-counter allergy and cold medicines, is ineffective in tablet form, an independent advisory committee to the US Food and Drug Administration ...