Phenylephrine relieves congestion of the nasal passages and is found in many cold and flu remedies. There is some controversy over whether it works at the dosages usually found in over-the-counter products. Sleeplessness is a common side effect.

Can you take phenylephrine before bed?

Phenylephrine doesn't last as long as other decongestants like pseudoephedrine (Sudafed). You shouldn't use it if you have high blood pressure. Can make your heart race or make you feel anxious and restless. Shouldn't use it before you want to sleep.

Is phenylephrine non drowsy?

This cold medicine provides maximum strength, non-drowsy relief for nasal and sinus congestion and sinus pressure due to the common cold, hay fever or other upper respiratory allergies. Maximum Strength Nasal Decongestant PE, Phenylephrine HCl, 10 mg does not contain pseudoephedrine, and is free of aspirin and gluten.