What are the possible symptoms of an allergic reaction to phenyxyethan?

Phenoxyethanol. Do you mean "phenoxyethanol?" according to a warning by the fda of 2008 "phenoxyethanol is a preservative that is primarily used in cosmetics and medications. It also can depress the central nervous system and may cause vomiting and diarrhea, which can lead to dehydration in infants".