Phenylephrine

Phenylephrine is a decongestant and vasoconstrictor. It narrows small blood vessels, which reduces swelling in the nose and eyes and can raise blood pressure when given by injection.

What Phenylephrine Is Used For

• Blocked nose from colds, flu and allergies
• Eye drops to dilate the pupil for eye examinations
• Red, irritated eyes in combination eye drops
• Low blood pressure during anaesthesia (injection in hospital)

Common Side Effects

• Restlessness or nervousness
• Headache
• Fast or pounding heartbeat
• Stinging of the eyes with eye drops
• Raised blood pressure

Precautions

Avoid phenylephrine if you have very high blood pressure, severe heart disease or an overactive thyroid, or if you have taken an MAOI antidepressant in the last 14 days. Do not use nasal decongestants for more than a few days at a time, as blocked nose can return worse. Ask a doctor before giving cold medicines to young children.

This page is general information only. It is not a substitute for advice from your doctor or pharmacist, and it does not include dosage. Always follow the directions given to you and read the leaflet inside the pack.