Phenylephrine - oral

Patient Medicine Information
Why do I need this medicine?
Phenylephrine belongs to a group of medicines called decongestant. It is used alone or in combination with other medicines to help relieve symptoms of cold such as blocked or runny nose, watery eyes and sneezing.
How do I take this medicine?
Take Phenylephrine exactly as directed by your doctor or according to the instructions on the label. Do not take more or less than instructed by your doctor.

This medicine is available as tablet or as a capsule. Swallow it whole. Try to take it at the same time each day.

You may stop taking Phenylephrine if you have no more congested nose.
What should I do if I have forgotten to take this medicine?
Take the missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and return to your normal dosing schedule.

DO NOT double a dose under any circumstances.
When should I not use this medicine?
Do not take Phenylephrine if you are currently taking or have taken a medicine to treat depression known as a monoamine oxidase inhibitor (MAOI) in the last 14 days.
What should I take note of while taking this medicine?
Inform your doctor if you have the following conditions:
  • heart disease
  • high blood pressure
  • thyroid disease
  • diabetes
  • enlarged prostate
Be sure to check with your doctor or pharmacist before giving this medicine to a child or to an elderly.

Let your doctor know if you are pregnant or breastfeeding.

Consult your doctor if symptoms do not improve within 7 days or if your symptoms are accompanied by fever.
What side effects could I experience?
Phenylephrine may cause dizziness. If affected, do not drive or take part in any activity in which you need to be alert.

Other side effects may include any of the following: headache, anxiety, excitability, restlessness, nervousness, difficulty sleeping, nausea and vomiting.

Inform your doctor if any of these side effects do not go away or are severe, or if you experience other side effects.
Can I take this with other medicines?
Do not take Phenylephrine if you are currently taking or have taken a medicine to treat depression known as a monoamine oxidase inhibitor (MAOI) such as isocarboxacid, phenelzine and tranylcypromine in the last 14 days.

Inform your doctor or pharmacist if you are taking any of these medicines:
  • other decongestants e.g. naphazoline, oxymetazoline, xylometazoline
  • medicines for high blood pressure or heart disease e.g. digoxin, prazosin
  • medicines for depression e.g. amitriptyline, nortriptyline
  • medicines for asthma e.g. bambuterol, salmeterol, terbutaline
This list does not include all medicines that may interact with Phenylephrine.

Always notify your doctor and pharmacist if you are taking any other medicines, including herbal tonics such as traditional Chinese medicines, supplements and medicines that you buy without a prescription.
What special dietary instructions should I follow?
Avoid alcohol, bitter orange and caffeine.
How should I store this medicine?
Store in a cool, dry place away from the reach of children.

Medicines must not be used past the expiry date.
This information is independently developed by MIMS based on phenylephrine - oral and is provided for your reference only. It is not a replacement for and should only be used in conjunction with full consultation with a licensed healthcare professional, the information provided by your pharmacist and/or the manufacturer of the medication. It may not contain all the available information you require and cannot substitute professional medical care, nor does it take into account all individual circumstances. Although great effort has been made to ensure content accuracy, we shall not be held responsible or liable for any claims or damages arising from the use or misuse of the information contained herein, its contents or omissions, or otherwise. Copyright © 2021 MIMS. All rights reserved. Powered by
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