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Phenylephrine is used to relieve nasal discomfort caused by colds, allergies, and hay fever. It is also used to relieve sinus congestion and pressure. Phenylephrine is in a class of medications called nasal decongestants. It works by reducing swelling of the nasal passages.
Phenylpropanolamine (PPA) is a drug of the phenethylamine family used as a decongestant and also as an appetite suppressant. In veterinary medicine, it is used to control urinary incontinence in dogs.
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