How do I take Alka-Seltzer XS?

Alka-Seltzer XS is an effervescent medication, which means it needs to be dissolved in water. Drop two tablets into half a glass (100ml) of water, wait for the tablets to dissolve completely, and drink. This medication is not recommended for children under the age of 16.

How often can I use Alka-Seltzer XS?

The recommended adult dose of Alka-Seltzer XS is 2 tablets every 4 hours as needed. However, it may be that your doctor recommends a higher dosage. Do not exceed 8 tablets in 24 hours.

Does Alka-Seltzer XS produce any side effects?

Alka-Seltzer XS rarely causes problems, being a tried and tested form of treatment, but it can occasionally produce side effects. These side effects may include the following:

• Stomach bleeding, which may result in black or tarry stools
• Nausea
• Vomiting
• Dizziness
• Diarrhoea
• Increased bleeding
• Blood thinning
• Asthma attacks (in asthma sufferers)

If you experience any of these effects, please cease treatment immediately and speak to a healthcare professional.

Alka-Seltzer XS ingredients

Alka-Seltzer XS uses a combination of aspirin, paracetamol and caffeine to create a tablet that fizzes and dissolves upon contact with water, providing fast relief after consumption.

The other ingredients are sodium hydrogen carbonate and citric acid.

• Alka-Seltzer XS: Patient Information Leaflet