Acetylcysteine - Oral

Patient Medicine Information
Why do I need this medicine?
Acetylcysteine is used together with other medicines to treat lung disorders associated with abnormal, thick and viscous mucous secretions (phlegm).

This medicine reduces the thickness of the phlegm so it can be cough up more easily.

Acetylcysteine may be used to treat other conditions as decided by your doctor.
How do I take this medicine?
Take this medicine 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.

Acetylcysteine is available as a powder for oral solution or effervescent tablet. Dissolve the tablet or contents of one sachet in a glass of water, stir and drink all the mixture. Diluted solution should be consumed within 1 hour of preparation.

This medicine should be taken together with food or immediately after a meal. Try to take it at the same time each day.
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.
What should I take note of while taking this medicine?
Inform your doctor if you have the following conditions:
  • asthma
  • bronchospasm (breathing distress caused by narrowing of the airways)
  • stomach ulcer
Let your doctor know if you are pregnant or breastfeeding.

Acetylcysteine may interfere with the results of urine tests for ketones. Discuss with your doctor how you should monitor your urine tests while taking this medicine.
What side effects could I experience?
Acetylcysteine may cause any of the following side effects: nausea, vomiting and rash.

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?
Inform your doctor and pharmacist if you are taking any of these medicines:
  • medicines that suppress coughing
  • antibiotics e.g. cephalosporins
  • activated charcoal (medicine for drug overdose or poisoning)
  • medicines for chest pain e.g. glyceryl trinitrate
This list does not include all medicines that may interact with Acetylcysteine.

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.
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 Acetylcysteine - 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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