Skip to Content

UK Edition. Click here for US version.


Active substance(s): ASPIRIN

View full screen / Print PDF » Download PDF ⇩


You should let your doctor know you are taking aspirin
tablets, particularly if you are going to have an operation,
as you may need to stop taking your tablets several days
before the operation.
Your blood, kidney and liver should be monitored during
prolonged use of aspirin as blood, kidney and liver
disorders may develop.

Your medicine is called Aspirin 300mg Tablets (called
Aspirin Tablets throughout the rest of this leaflet).
What this medicine does
Aspirin Tablets are used for the symptomatic relief of mild
to moderate pain, including migraine, toothache, neuralgia,
headache, sore throat, period pains, aches and pains
(including muscle pains and backache). For the
symptomatic relief of influenza, feverishness and feverish
colds. For the symptomatic relief of sprains, strains,
rheumatic pain, sciatica, lumbago, fibrositis, joint swelling
and stiffness.
Aspirin belongs to a group of medicines called
non-steroidal anti-inflammatory drugs (NSAIDs). Aspirin
works by preventing the release in the body of substances
which cause pain, inflammation and fever.
There is a possible association between aspirin and
Reye’s Syndrome when given to children. Reye’s
syndrome is a very rare disease, which can be fatal. For
this reason aspirin should not be given to children aged
under 16 years, unless on the advice of a doctor.
Do not take Aspirin Tablets if you:
• are allergic (hypersensitive) to aspirin or other
non-steroidal anti-inflammatory drugs (NSAIDs) e.g.
ibuprofen, or any of the other ingredients of Aspirin
Tablets (see Section 6 What Aspirin Tablets contain).
Symptoms may include rhinitis (runny nose), swollen
face, mouth or tongue, itchy rash or asthma attack;
• have or have had a stomach ulcer;
• have a condition where your blood does not clot
properly (e.g. haemophilia);
• are taking medicines to thin your blood such as warfarin;
• have or have had gout;
• are in the last 3 months of pregnancy or are
Talk to your doctor or pharmacist if any of the following
apply to you:
• if you have asthma, or suffer from allergies;
• if you have problems with your heart, kidneys or liver;
• if you are dehydrated;
• if you have nasal polyps (inflamed swellings inside the
• if you suffer from indigestion (dyspepsia)
• if you have an infection
• if you have high blood pressure;
• if you have a lack of glucose 6-phosphate
dehydrogenase (G6PD);
• if you are elderly;
• if you are diabetic.
The product belongs to a group of medicines which may
impair the fertility in women. This effect is reversible on
stopping the medicine.

Using other medicines
Make sure your doctor knows if you are taking a medicine
listed here:
• Alcohol: some of the effects of aspirin are enhanced.
• Mifepristone (used to terminate pregnancy). You should
not take aspirin until eight to twelve days after
mifepristone. If taken with aspirin this medicine may
not be as effective.
• Non-steroidal anti-inflammatory (NSAIDs) e.g.
ibuprofen or diclofenac sodium (used for pain relief and
to treat inflammation)or Corticosteroids e.g.
prednisolone and betamethasone (used to treat allergy
or inflammation): if taken with aspirin you may have
more severe side effects e.g. increased risk of bleeding
or ulcers in the stomach. If you suddenly stop taking
corticosteroids you may develop aspirin poisoning.
• Metoclopramide (used to treat nausea and vomiting): it
may increase the effect of aspirin.
• Adsorbents e.g. kaolin (for diarrhoea) and Antacids e.g.
aluminium hydroxide and magnesium carbonate (used
to treat indigestion): these medicines may reduce the
effect of aspirin.
• Medicines known to affect the clotting of your blood: if
you take one of these medicines below with aspirin you
may increase the likelihood of bleeding.
• Coumarins e.g. warfarin, phenindone or heparins
(blood thinning medicines), streptokinase.
• Clopidogrel and ticlopidine (used to prevent strokes
and heart attacks).
• Calcium channel blockers such as verapamil, used to
treat high blood pressure.
• ACE Inhibitors or Angiotensin-II Receptor Antagonists
e.g. captopril, enalapril maleate, valsartan, losartan
(used to lower high blood pressure): taken with aspirin
these medicines may not be as effective and you may
suffer from kidney problems.
• Antidepressants (used to treat depression) e.g.
Selective Serotonin Re-uptake Inhibitors (SSRIs) (such
as venlafaxine): if taken with aspirin you may increase
the likelihood of bleeding.
• Medicines to control epilepsy e.g. phenytoin and
valproate: aspirin may increase the effect of these
medicines. If you take sodium valproate with aspirin you
may increase the likelihood of bleeding.
• Zafirlukast (used to prevent or treat asthma).
• Spironolactone (diuretic) water tablets, Probenicid or
Sulfinpyrazone (used to treat gout): if taken with aspirin
these medicines may not be as effective.
Phenylbutazone may reduce the effect of aspirin.
• Methotrexate (used in the treatment of arthritis, Crohn’s
disease and cancer) or Carbonic anhydrase inhibitors
e.g. acetazolamide (used in the treatment of glaucoma,
epilepsy and excess water retention): if taken with
aspirin the side effects of these medicines may become
more severe.
• Steroids such as cortisone and hydrocortisone, used to
treat allergic conditions.
• Thiopental (used as an anaesthetic).
• Gold compounds (used to treat rheumatoid arthritis).
• Insulin and other drugs used to treat diabetes.
• Sulphonamides, such as sulphamethoxazole, used to
treat infections.
• Vitamin C.
• Cilostazol (for leg pain that occurs when walking due to
poor circulation): the dose of aspirin should not be
greater than 80mg a day.
Aspirin may affect the results of thyroid function tests.
If you have been told by your doctor that you have an
intolerance to some sugars, contact your doctor before
taking this medicinal product, as it contains lactose.

pg 1/2

Tell your doctor or pharmacist if you are taking or have
recently taken any other medicines, including medicines
obtained without a prescription.

• severe skin problem with shedding of the upper layer;
• you may succumb to infections more easily;
• you may bruise more easily.

Pregnancy and breast-feeding
If you are pregnant, thinking of becoming pregnant, or
breast-feeding, ask your doctor or pharmacist for advice
before taking Aspirin Tablets.

Some patients have developed liver problems (particularly
with high doses).

For oral use.
Follow the instructions on the label about how to take your
medicine. Check with your doctor or pharmacist if you are
not sure.
Adults (including the elderly and children over 16 years):
The usual dose is one to three tablets, swallowed whole
with water. The dose should not be taken more frequently
than every four hours and not more than four times in any
24 hour period.
Maximum daily dose: 12 tablets (3.6g) every 24 hours in
divided doses.
Take the tablets with or immediately after food to reduce
the risk of getting stomach and bowel irritation.
Do not exceed the stated dose.
If symptoms persist for more than three days, consult your
Children and Adolescents
Aspirin should not be given to children aged under 16 years
of age unless on the advice of a doctor.
If you take more Aspirin Tablets than you should
If you take more Aspirin Tablets than your doctor has
prescribed contact your nearest hospital casualty
department or doctor immediately. Take the medicine or
this leaflet with you to show the doctor.
Symptoms of an overdose include vomiting, dehydration,
tinnitus, vertigo, headache, nausea, dizziness,
restlessness, heart failure, breathing failure, deafness,
sweating, warm extremities with racing pulse, increased
breathing rate and hyperventilation.
If you forget to take Aspirin Tablets
• If you forget to take a dose, do not worry. Take the next
dose when it is due.
• Do not take double the amount to make up for a
forgotten dose.
If you have any further questions on the use of this
product, ask your doctor or pharmacist.
Like all medicines, Aspirin Tablets can cause side effects,
although not everybody gets them.
If you experience the following side effects while taking
your medicine, you should stop taking your tablets and
tell your doctor straight away:
• allergic reaction (hypersensitivity) which may include
lumpy skin or hives, skin rash, swelling of eyelids, face,
lips, mouth or tongue, or sudden wheeziness, or induce
or worsen asthma attacks;
• you suffer from severe or persistent indigestion,
stomach upset or pain, you may develop ulcers or
bleeding from the stomach which can cause severe
stomach pain, bloody or black tarry stools or vomiting
Other possible side effects:
• stomach upset and feeling sick;
• an increased tendency to bleed;
• anaemia and other blood disorders;
• mouth ulcers;
• slight blood loss which may result in iron-deficiency
anaemia during long term use;
• diarrhoea;
• blood in the urine;
• Stevens-Johnson syndrome (fever, rash sore mouth and
eyes, joint and muscle aches);

If any of the side effects get serious, or if you notice any
side effects
not listed in
this leaflet,
please tell
your doctor or
Keep out of
the reach and
sight of
Do not use after the expiry date stated on the label.
Do not store above 25°C. Store in the original container.
Do not use if you notice that the pack is damaged. Return it
to your pharmacist.
Medicines should not be disposed of via wastewater or
household waste. Ask your pharmacist how to dispose of
medicines no longer required. These measures will help to
protect the environment.
What Aspirin Tablets contain
The active substance is aspirin. Each tablet contains
300mg of aspirin.
The other ingredients are lactose, starch and talc.
What Aspirin Tablets look like and contents of the pack
Aspirin Tablets are white, round tablets, which have
embossed on one face and a break line on the other.
Each pack of Aspirin Tablets contains 8, 10, 12, 16, 20, 24,
25, 28, 30, or 32 tablets. Packs of 20, 24,25,28, 30 and
tablets are only available from your pharmacist. Packs of
48, 50, 96 and 100 tablets are only available on
prescription from your doctor. Packs of 250, 500, 1000
and 5000 are dispensary packs only. Not all pack sizes are
Marketing Authorisation Holder
Wockhardt UK Ltd, Ash Road North, Wrexham, LL13 9UF, UK
CP Pharmaceuticals Ltd, Ash Road North, Wrexham,
LL13 9UF, UK.
Other formats:
To listen to or request a copy of this leaflet in Braille, large
print or audio please call, free of charge:
0800 198 5000 (UK Only)
Please be ready to give the following information:
Product Name

Reference Number

Aspirin 300mg Tablets


This leaflet was last revised in November 2010


pg 2/2

Expand view ⇕

Source: Medicines and Healthcare Products Regulatory Agency

Disclaimer: Every effort has been made to ensure that the information provided here is accurate, up-to-date and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. This information has been compiled for use by healthcare practitioners and consumers in the United States. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate that the drug or combination is safe, effective or appropriate for any given patient. If you have questions about the substances you are taking, check with your doctor, nurse or pharmacist.