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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.
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.
Medications such as clonidine and dexmedetomidine target pre-synaptic auto receptors, therefore leading to an overall decrease in norepinephrine which clinically can cause effects such as sedation, analgesia, lowering of blood pressure and bradycardia. There is also low quality evidence that they can reduce shivering post operatively.
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 ...
When two drugs affect each other, it is a drug–drug interaction (DDI). The risk of a DDI increases with the number of drugs used. [1] A large share of elderly people regularly use five or more medications or supplements, with a significant risk of side-effects from drug–drug interactions. [2] Drug interactions can be of three kinds:
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 ...
It is often used in combination with other medications. [1] It is believed to work by making airway secretions more liquid. [1] Side effects may include dizziness, sleepiness, skin rash, and nausea. [2] Guaifenesin has been used medically since at least 1933. [3] It is available as a generic medication and an over-the-counter drug. [1] [4]
The FDA advisory committee’s decision last year was nonbinding — meaning the FDA itself makes the final call on whether oral phenylephrine is considered effective and whether it needs to be ...