Alka Seltzer tablets must always be dissolved in water before use.
Adults and children over 16:
Two tablets dissolved in half a glass (100ml) of water may be taken every 4 hours as required.
You should not take more than 8 tablets in 24 hours.
Not recommended in children under 16.
The tablets should preferably be taken after eating.
Make sure you follow the dosage instructions and do not take more than the stated dose.
Do not take Alka Seltzer for more than 3 days in a row.
If symptoms persist, speak to your doctor or pharmacist.
Do not take Alka Seltzer if you:
Are allergic (hypersensitive) to aspirin, Sodium Hydrogen Carbonate, Citric Acid or any of the other ingredients of Alka Seltzer.
Are allergic to any other pain relieving or anti-inflammatory medicines (e.g. NSAIDS or Salicylates).
Have a disorder which causes excessive bleeding such as haemophilia.
Have, or have had, a stomach or duodenal ulcer.
Are on a high dose of Methotrexate (15mg per week or more).
Are pregnant or breastfeeding, unless advised by a doctor.
Have severe heart, liver or kidney problems.
Have asthma that is worsened by aspirin or any other NSAID.
Speak to your doctor before taking Alka Seltzer if you:
Suffer from tightness in the chest, asthma, nasal polyps, hay fever or allergies.
Have low uric acid excretion, which is commonly associated with gout.
Have a history of gastrointestinal disorders (regular stomach upsets).
Have kidney or liver problems.
Have problems with your circulation (kidney or heart disease).
Have Glucose-6-phosphate Dehydrogenase (G6PD) deficiency (a hereditary condition that may result in anaemia).
Are about to have surgery.
Before the operation tell the doctor or surgeon that you are taking aspirin.
Are elderly, as you are more likely to experience unwanted side effects.