Alginate Compare
Find the cheapest raft-forming antacid available in the US — sorted by cost per dose.
What is sodium alginate? It's a seaweed-derived ingredient that forms a floating gel "raft" on top of stomach contents when it contacts acid — physically blocking reflux rather than just neutralizing it. It works differently from calcium carbonate or proton pump inhibitors.
Why isn't this at CVS? The Gaviscon sold in US pharmacies uses aluminum and magnesium hydroxide — not sodium alginate. The UK formulation does. The products below are US-made sodium alginate brands and UK Gaviscon imports available on Amazon.
| Product↕ | $/dose↑ | Buy |
|---|---|---|
 Gaviscon Advance Liquid ("Gav") 500ml UK importWeird: On Amazon this is available but they are hiding the Gaviscon name and the bottle design looks like medical supply and not retail | $0.36 Best value | Amazon → |
$0.68 | British Essentials ↗ | |
 Gaviscon Advance Chewable 120 tablets (2-pack) UK import | $0.42 | Amazon → |
Gaviscon Advance Chewable 60 tablets UK importThese get really gummy when chewing | $0.50 | Amazon → |
 Reflux Gourmet 8 oz US | $0.60 | Amazon → |
$0.60 | Reflux Gourmet ↗ | |
 Reflux Raft 8 oz USDiscount with subscription | $0.70 | Amazon → |
$0.70 | Reflux Raft ↗ | |
 Gaviscon Double Action Liquid 600ml UK import | $0.87 | Amazon → |
$1.03 | British Essentials ↗ | |
 Gaviscon Double Action Tablets 48 tablets UK import | $1.12 | Amazon → |
 Reflux Gourmet 25 single-serve packs US | $1.28 | Amazon → |
$1.28 | Reflux Gourmet ↗ | |
HK HartSpan Khelp 60 capsules USNewest on market? Discount with subscription | $1.80 | Amazon → |
$1.80 | HartSpan ↗ |