Hey as Phenylpropanolamine (BAN and INN; PPA, β-hydroxyamphetamine), also known as the stereoisomers (−)-norephedrine and norpseudoephedrine, is a psychoactive drug of the phenethylamine and amphetamine chemical classes

Effects:
Increases heart rate, force of contraction, and cardiac output and excitability, possibly by stimulating beta-adrenergic receptors in the heart
Causes CNS stimulation {by releasing norepinephrine from storage sites.
Produces mydriasis

Uses
It is used as Stimulant, decongestant, and anorectic agent.
It is commonly used in prescription and over-the-counter cough and cold preparations.
In veterinary medicine, it is used to control urinary incontinence in dogs under trade names Propalin and Proin

Pharmacology
Phenylpropanolamine acts as an alpha-adrenergic receptor and beta-adrenergic receptor agonist as well as a dopamine receptor D1 partial agonist.
Many sympathetic hormones and neurotransmitters are based on the phenethylamine skeleton, and function generally in "fight or flight" type responses, such as increasing heart rate, blood pressure, dilating the pupils, increased energy, drying of mucous membranes, increased sweating, and a significant number of additional effects.