Side Effects & SafetyPhenethylamine is POSSIBLY UNSAFE for most people when taken by appropriately. Phenethylamine works similar to the drug , and may cause similar side effects. Also, it might cause rapid , , or agitation. Special Precautions & Warnings: and -feeding: Not enough is known about the safety of using phenethylamine during pregnancy and -feeding. Stay on the safe side and avoid use. : Use of phenethylamine might cause people with to convert from depression to . : Use of phenethylamine might worsen , including or delusions. Surgery: Phenethylamine might affect the central . This could interfere with surgery. Stop taking phenethylamine at least 2 weeks before a scheduled surgery.. 1-Amino-2-phenylethane, 2-Phenethylamine, 2-Phenylethylamine, Benzeneethanamine, Beta-phenethylamine, Beta-phenylethylamine, PEA, Phenethylamine HCl, Phenethylamine Hydrochloride, Phenylethylamine.. Phenethylamines, or more properly, substituted phenethylamines, are the group of phenethylamine derivatives that contain phenethylamine as a "backbone"; in other words, this chemical class includes derivative compounds that are formed by replacing one or more hydrogen atoms in the phenethylamine core structure with substituents..