https://www.fda.gov/drugs/information-drug-class/fda-letter-manufacturers-drug-products-containing-phenylpropanolamine-ppa
FDA Letter to Manufacturers of Drug Products Containing Phenylpropanolamine (PPA) | FDA
manufacturers ofdrug productsfdalettercontaining
https://pubmed.ncbi.nlm.nih.gov/2574626/
Terfenadine with or without phenylpropanolamine in the treatment of seasonal allergic rhinitis
The efficacy of terfenadine in combination with phenylpropanolamine was assessed by comparison with terfenadine alone in a double-blind, parallel group study...
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