Aspirin - oral

Patient Medicine Information
Why do I need this medicine?
Aspirin helps relieve pain, inflammation and fever.

This medicine is a blood-thinning medicine. It prevents special cells in the blood from sticking to each other. This reduces the risk of harmful blood clots forming in your body. Blood clots that form in a blood vessel inside the heart or brain can cause a heart attack or a stroke.

Aspirin helps lower the chance of heart attacks and strokes to those who are of high risk. It may be used to prevent heart attacks and strokes in patients who have previously suffered from these conditions.

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

Take it with food or immediately after a meal with a glass of water. Try to take it at the same time each day.

Aspirin is available as an enteric coated, modified release, chewable or orally disintegrating tablet.

If you are taking the enteric-coated/modified-released, swallow it whole. Do not divide, chew or crush the tablet.

If you are taking the orally disintegrating tablet (orodispersible tablet):
  1. Remove it from the foil only just before you take it. Do not leave the orodispersible tablet exposed to air. Do not push the orodispersible tablet through the foil as it is fragile and easily broken.
  2. Remove the orodispersible tablet with dry hands by peeling the backing off the foil and tipping the tablet onto your dry hands.
  3. Place the orodispersible tablet directly on your tongue as soon as it is taken out of the foil. The orodispersible tablet will immediately start to melt on the tongue. It can then be swallowed with or without water.
Do not cut, break or crush the orodispersible tablets.

The dose of this medicine will be decided by your doctor. Your doctor will advise you on the dosage and treatment timeframe depending on your condition.

You may stop taking Aspirin when there is no more pain, inflammation or fever.
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.

If you often forget to take your medicine, let your doctor and pharmacist know.
When should I not use this medicine?
Do not take this medicine if you ever had an allergic reaction (rashes, breathlessness, swollen eyes) to Aspirin or to any other similar medicines such as diclofenac, ibuprofen, mefenamic acid or naproxen.

Alert your doctor if you have any of the following conditions:
  • stomach ulcers
  • bleeding disorder
  • gout or with a history of gout
  • severe liver disease
  • severe kidney disease
as Aspirin may not be suitable for you.

Do not take high doses of Aspirin (above 100 mg daily) if you are on your third trimester of pregnancy.

Do not take this medicine if you are breastfeeding.

Do not give this medicine to children below 16 years old unless instructed to do so by the doctor.

Do not take Aspirin with medicines used for certain immune disorder, pain and inflammation.
What should I take note of while taking this medicine?
Inform your doctor if you have the following conditions:
  • asthma or any other form of allergies
  • moderate kidney disease
  • moderate liver disease
  • uncontrolled high blood pressure
  • G6PD deficiency (an inherited blood disorder that affects the red blood cell)
  • dehydration
  • low red blood cell count
  • stomach problems such as indigestion
  • heavy or prolonged menstrual bleeding
Let your doctor know if you are pregnant or breastfeeding.

If you are going for an operation, including minor operations and dental work, inform your doctor or dentist that you are taking Aspirin.

Do not participate in activities in which you may fall or get injured, such as contact sports. Alert your doctor if you get any unusual bruising (large bruises or several bruises) or bleeding that takes a long time to stop (for example, too much bleeding when you floss or brush your teeth).

For as long as you are taking this medicine, you may need to have regular blood tests to check your body's response to the medicine. Your doctor will advise you about how often you need to have blood tests.
What side effects could I experience?
Aspirin may cause any of these side effects: headache, nausea, vomiting, stomach pain, ringing in the ears, rash and indigestion.

Some side effects may need immediate medical help. Alert your doctor quickly if you experience any of the following:
  • rashes, breathlessness, swelling of the face, eyes or mouth
  • rashes with skin peeling or blisters / rashes with peeling of the skin or blistering of the lips, mouth or eyes accompanied by fever
  • pass out bloody stools or black as tar or vomiting as ground coffee
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 Aspirin if you are taking any of these medicines:
  • other medicines for pain and inflammation (NSAIDs) e.g. indometacin, piroxicam
  • methotrexate (medicine used to treat immune disorders)
Inform your doctor and pharmacist if you are taking any of these medicines:
  • other blood-thinning medicines e.g. warfarin, clopidogrel, heparin
  • medicines for mood disorders e.g. venlafaxine, sertraline, paroxetine
  • medicines for epilepsy (fits or seizures) e.g. phenytoin, sodium valproate
  • medicines for gout e.g. probenecid, sulfinpyrazone
  • medicines for vomiting e.g. metoclopramide
  • medicines used in organ transplant or other immune disorders e.g. ciclosporin
This list does not include all medicines that may interact with Aspirin.

This medicine should not be taken with antacids as antacids could reduce the effectiveness of Aspirin. If you must take antacids, take between meals at least 2 hours after you have taken this medicine.

Always notify your doctor or 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 aspirin - 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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