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A decongestant, or nasal decongestant, is a type of pharmaceutical drug that is used to relieve nasal congestion in the upper respiratory tract.The active ingredient in most decongestants is either pseudoephedrine or phenylephrine (the latter of which has disputed effectiveness).
Phenylephrine is a selective α 1-adrenergic receptor agonist with minimal to no β-adrenergic receptor agonist activity or induction of norepinephrine release. [5] [8] [15] It causes constriction of both arteries and veins. [12] Phenylephrine was patented in 1933 [16] and came into medical use in 1938. [17] It is available as a generic medication.
Phenylephrine is an over-the-counter drug that has been used for decades to relieve congestion and stuffy nose caused by allergies or colds, and purportedly works by reducing the swelling of blood ...
Phenylephrine is the main ingredient used in many common over-the-counter congestion products. It is safe to use, but an independent advisory committee to the FDA agreed Tuesday that it is ...
Norepinephrine is synthesized by the body from the amino acid tyrosine, [3] and is used in the synthesis of epinephrine, which is a stimulating neurotransmitter of the central nervous system. [4] All sympathomimetic amines fall into the larger group of stimulants (see psychoactive drug chart).
After an FDA advisory committee said the decongestant phenylephrine, an ingredient found in many oral cold and flu medications, is ineffective, experts weigh in on alternatives.
An adrenergic agonist is a drug that stimulates a response from the adrenergic receptors.The five main categories of adrenergic receptors are: α 1, α 2, β 1, β 2, and β 3, although there are more subtypes, and agonists vary in specificity between these receptors, and may be classified respectively.
Doctors have said oral phenylephrine is ineffective to relieve nasal congestion. An FDA panel will reevaluate the evidence. ... Phenylephrine was approved by the FDA for over-the-counter use in ...