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Pharmacy, clinic and prescribers based in Greater Manchester.
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Variety of delivery options including next day & free delivery.
Pharmacy, clinic and prescribers based in Greater Manchester.
Start your treatment with a quick and free online consultation.
Fill in a quick online consultation for our licensed pharmacists to review.
Our pharmacists will review your treatment to ensure it’s suitable.
Your treatment will be delivered to your door quickly & discreetly.
| Medication Name | Alka-Seltzer Original |
| Type and Form of Medicine | Effervescent tablets |
| What it Does | Relieves headache with upset stomach, heartburn, and indigestion |
| Active Ingredients | Aspirin, sodium hydrogen carbonate, citric acid |
| Strength | Each tablet contains aspirin 324mg, sodium hydrogen carbonate 1,744mg, citric acid 965mg |
| Size | Available in packs of 10 or 20 effervescent tablets |
| Patient Information Leaflet | Click here |
Alka-Seltzer Original are effervescent aspirin tablets with added antacid ingredients. They provide quick relief from headache with upset stomach, indigestion, and acid-related discomfort, while also easing pain such as migraine, toothache, period pain, and fever.
Alka-Seltzer Original is used for the short-term relief of:
Alka-Seltzer Original contains:
The effervescent form helps the ingredients absorb quickly for fast relief.
Alka-Seltzer Original is suitable for adults and children over 16 years old.
It may not be suitable if you:
Like all medicines, Alka-Seltzer may cause side effects.
For the full list of side effects, see the patient information leaflet.
Active Ingredients: Aspirin 324mg, sodium hydrogen carbonate 1,744mg, citric acid 965mg per tablet.
Other Ingredients: None.
It relieves headache with upset stomach/indigestion, mild to moderate pain, fever, and cold & flu symptoms, and helps with rheumatic/muscular aches.
Dissolve 2 tablets in ~100 ml water every 4 hours if needed, up to 8 tablets in 24 hours, for no more than 3 days.
Avoid combining with other NSAIDs (like ibuprofen/naproxen) — risk of stomach irritation/bleeding increases. Ask a pharmacist about alternatives (e.g., paracetamol) if extra pain relief is needed.
Do not use if you are pregnant, breast-feeding or trying for a baby unless your doctor tells you to.
No — not for under-16s due to the risk of Reye’s syndrome. Speak to a pharmacist about child-appropriate options.
Yes. Each tablet contains about 477 mg sodium. Seek advice if you’re on a low-sodium diet.
It dissolves to work fast; taking it after food may reduce stomach upset. Follow the label and PIL.
It can relieve headache with upset stomach after a heavy night, but avoid alcohol while taking Alka-Seltzer and don’t exceed the dose/duration limits. If symptoms persist, speak to a pharmacist or GP.
Page content authored by Muhammad, last reviewed by Amjad Khan on 15th September 2025.
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