Neo-synephrine
Phenylephrine is a selective α1-adrenergic receptor agonist used primarily as a decongestant, as an agent to dilate the pupil, and to increase blood pressure. Phenylephrine has recently been marketed as a substitute for pseudoephedrine (e.g., Sudafed (Original Formulation)), but there are claims that oral phenylephrine may be no more effective as a decongestant than a placebo (see questions about effectiveness below).
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