Sodium Alginate + Calcium Carbonate + Sodium Bicarbonate

Gaviscon Dual Action Chewable Tablets 16s

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Gaviscon Dual Action Chewable Tablets — pink dual-mechanism antacid tablets for fast heartburn relief

💊 Active: Sodium Alginate, Calcium Carbonate, Sodium Bicarbonate
⏱️ Dosage: Chew 2-4 tablets, up to 4 times daily
🍽️ Timing: Chew after meals and at bedtime
📦 Pack: 16 chewable tablets per box
⚡ Benefit: Chew anywhere, no water needed — ideal for work or travel
🌡️ Storage: Below 30°C, away from sunlight

Option: Quantity 16 tablets
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What is Gaviscon Dual Action?

Gaviscon Dual Action chewable tablets are a fast-acting antacid for acid reflux, combining Sodium Alginate, Calcium Carbonate, and Sodium Bicarbonate. The alginate forms a gel barrier that blocks reflux while the antacids neutralise stomach acid, easing heartburn and sour burping after meals. Chew 2 to 4 tablets after meals and at bedtime, no water needed.

🛒 16 tablets · authentic · 24-hour dispatch from Intimo Life — consult a doctor or pharmacist before use.

Product Description

An antacid for acid reflux, Gaviscon Dual Action chewable tablets use two mechanisms in one tablet: Sodium Alginate forms a gel raft that blocks acid reflux, while Calcium Carbonate and Sodium Bicarbonate neutralise stomach acid immediately. Unlike the liquid format, these tablets work instantly with no water needed — ideal for work or travel.

📊 Key facts about Gaviscon chewable tablets

  • A meta-analysis found alginate therapy resolves GERD symptoms far better than placebo or plain antacids (Leiman et al., PMC6036656)
  • Chew tablets thoroughly, do not swallow whole, so the medicine mixes with saliva and acts faster (NHS UK)
  • Ideal for anyone needing acid reflux relief without a bottle, spoon, or water
  • For daily chronic reflux, Nexium (Esomeprazole) gives all-day control, while Gaviscon suits fast, on-the-go relief

🏭 Manufactured by Reckitt Benckiser Healthcare (UK) Limited. Same Dual Action formula as the liquid version, in a pink chewable tablet, 16 per box.

⚠️ People on sodium-restricted diets or with kidney disease should consult a pharmacist before use.

Supatcheree A., Pharmacist

Medically reviewed by

Supatcheree A., Pharmacist | Sources: NHS, PMC, MIMS, Drugs.com

Last reviewed: 2026-07-04

About Gaviscon Dual Action Tablets

What is Gaviscon Dual Action?

Gaviscon Dual Action chewable tablets are an antacid and alginate-based reflux treatment with two mechanisms in one tablet — the same formula as the liquid version, just in a more portable form.

Mechanism 1 — Alginate Raft: Once chewed and mixed with saliva, Sodium Alginate reacts with stomach acid within minutes, forming a thick gel that floats on stomach contents and blocks acid from refluxing into the oesophagus.

Mechanism 2 — Acid Neutralisation: Calcium Carbonate and Sodium Bicarbonate neutralise existing stomach acid, relieving heartburn and sour belching quickly.

Because Gaviscon is not absorbed into the bloodstream, this pink chewable tablet is a non-systemic option for acid reflux, and more convenient than the liquid since no bottle or measuring cap is needed.

What Does Gaviscon Treat?

Gaviscon chewable tablets relieve symptoms from acid reflux and excess stomach acid, especially post-meal:

  • Heartburn — chest burning after meals, worse when lying down or bending over
  • Sour or bitter reflux — acid rising to the throat, leaving a sour or bitter taste
  • Indigestion — upper abdominal bloating or discomfort after eating
  • Pregnancy reflux — generally considered a safe option since it is not absorbed into the body, but consult your doctor or pharmacist for peace of mind

These tablets are best for acute post-meal symptoms or times when carrying liquid medicine isn't convenient. For daily chronic GERD, a PPI may be more appropriate.

How to Chew Gaviscon — Dosage

Dosage for adults and children aged 12 and over:

  • Chew 2 to 4 tablets, up to 4 times a day
  • Chew thoroughly before swallowing — do not swallow tablets whole
  • Maximum daily dose: 16 tablets (one box)

When to chew Gaviscon tablets — before or after food? Always chew them after meals, since the alginate raft mechanism relies on stomach acid stimulated by food, and again at bedtime to guard against reflux while lying down.

Unlike the liquid version, which needs a measuring spoon, these tablets can be chewed instantly with no extra equipment — convenient at work, out and about, or while travelling.

Do not use these tablets for more than 7 consecutive days without consulting a pharmacist.

Gaviscon Tablet Side Effects

Gaviscon tablets are generally well tolerated with few side effects, largely because they are not absorbed into the bloodstream. Possible adverse effects include:

  • Bloating and flatulence — Sodium Bicarbonate releases CO₂ when reacting with stomach acid; this usually passes as belching
  • Mild nausea — occasional, especially if several tablets are chewed together
  • Constipation — Calcium Carbonate can slow bowel movements with frequent or high-dose use

Gaviscon contains sodium. People managing sodium intake due to heart disease, high blood pressure, or kidney impairment should inform their pharmacist before using this antacid.

If signs of allergy occur — such as a rash or difficulty breathing — stop use and consult a pharmacist promptly.

Contraindications and Precautions

Contraindications:

  • Known allergy to any ingredient — sodium alginate, sodium bicarbonate, or calcium carbonate
  • Children under 12 years — do not use the adult formulation

Precautions:

  • Pregnancy — generally considered safe, but consult your doctor or pharmacist first
  • Sodium-restricted diets, such as kidney disease, heart disease, hypertension — these tablets contain sodium; use with caution
  • Other medicines — chew Gaviscon at least 2 hours apart from other medicines to avoid affecting their absorption
  • Do not use for more than 7 consecutive days — if symptoms persist, or you experience unexplained weight loss, difficulty swallowing, or vomiting blood, seek medical attention promptly

How does Gaviscon Dual Action compare to other reflux medications?

Acid reflux medications come in several forms, each suited to a different situation:

  • Gaviscon Dual Action liquid — same formula, equally fast-acting, and easier to fine-tune the dose, but needs a bottle and measuring cap
  • Gaviscon Peppermint chewable tablets — the original formula, cooling mint flavour, equally chewable with no water needed — pick whichever taste you prefer
  • Omeprazole GPO (a PPI) — suppresses acid production at the source; slower onset but all-day control, better suited to chronic daily reflux than these fast-acting tablets
  • PPIs such as Nexium, mentioned above, are also suited to chronic symptoms

Simple guide: Acute heartburn on the go, need portability → Gaviscon Dual Action tablets | At home, want a finely adjustable dose → Gaviscon liquid | Prefer mint → Peppermint tablets | Daily chronic GERD → a PPI

How Quickly Do These Tablets Work?

Gaviscon Dual Action tablets are among the fastest-acting acid reflux treatments available, because the mechanism is physical rather than biochemical:

  • 3–5 minutes — heartburn relief typically begins once the tablet is fully chewed and the gel raft forms
  • 2–4 hours — the alginate raft persists in the stomach before being broken down through normal digestion
  • Compared to PPIs — PPI medications need 1–4 weeks to reach full effect, so these tablets are useful for acute relief while a PPI takes effect

If symptoms do not improve within 30 minutes, or are severe, consult a pharmacist for further guidance.

How do the different Gaviscon colours differ?

Gaviscon comes in several colours by formula: green (Original/Peppermint — the classic formula), orange (Advance — double-strength alginate), and pink (Dual Action — available as liquid or tablets). The pink Dual Action formula combines two mechanisms — forming a gel raft and neutralising acid — in one product, and this chewable tablet version adds the convenience of a portable, no-water format. Read the full colour breakdown on our Gaviscon guide.

Where to buy Gaviscon Dual Action tablets?

Where to buy Gaviscon Dual Action tablets?

Order Gaviscon Dual Action chewable tablets online at Intimo Life. We deliver across Thailand within 1–3 business days. All orders are packed discreetly — no product name printed on the outer packaging.

⚠️ Disclaimer

The content in this article is for general educational purposes only. It is not intended to replace professional advice, diagnosis, or treatment from a doctor or pharmacist. If you have any questions about symptoms or medication use, always consult a doctor or pharmacist first.

Frequently Asked Questions

These tablets are generally considered safe in pregnancy, since Sodium Alginate is not absorbed and does not cross the placenta. NHS UK lists Gaviscon as a recommended option for pregnancy heartburn. As it contains sodium, consult a doctor or pharmacist before long-term use, especially in the first trimester.

Neither is clearly better — it depends on lifestyle. At work, travelling, or on the go, chewable tablets are handier since no water or spoon is needed. At home, the liquid offers more flexible dosing. The active ingredients and mechanism are identical either way.

Always chew thoroughly before swallowing — never swallow it whole. The alginate raft needs saliva from chewing to react fully with stomach acid. Swallowing whole slows the effect and risks choking. If you accidentally swallow one whole and symptoms persist, just chew the next dose as normal.

Chew it as soon as you remember, even if some time has passed. Gaviscon does not need a steady blood level like chronic medications, so a delayed dose is not dangerous. Do not chew a double dose to compensate — stick to the normal 2 to 4 tablets per dose.

This product is labelled for adults and children 12 and over only. Under-12s should not use the adult tablets, as the dose per tablet is not designed for young children and swallowing whole risks choking. If your child has reflux symptoms, consult a paediatrician.

Yes, they travel well in a bag since tablets do not leak like the liquid version. Avoid leaving them in a car parked in direct sun for long periods — above 30°C the tablets may soften or degrade faster. Store them in a shaded bag or compartment instead.

Yes, there is no dangerous interaction. However, caffeine can worsen reflux symptoms in some people. If heartburn flares after tea or coffee, chew the tablets after your drink or meal as usual, and try cutting back on caffeine to see if it helps.

The pink tablets have a mildly sweet-tart taste from the calcium content, with no spicy or bitter notes. Most people find them easier to chew than expected, with a texture like an ordinary chewable tablet — good if you worry about a strong taste in public.

Chewing more than 16 tablets a day can increase bloating from excess sodium and calcium, and raise constipation risk. If you take a large overdose or notice unusual symptoms such as severe stomach pain, contact a pharmacist or seek medical attention.

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