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What is the most important information I should know about diphenhydramine and phenylephrine?

April 26, 2017antihistamine decongestant diphenhydramine lq phenylephrine

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What is the most important information I should know about diphenhydramine and phenylephrine?

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Older adults may be more likely to have side effects from this medication. Artificially-sweetened liquid forms of cold medicine may contain phenylalanine. This would be important to know if you have phenylketonuria (PKU). Check the ingredients and warnings on the medication label if you are concerned about phenylalanine.