Gastro Bismol

Gastro Bismol is an oral liquid suspension with Bismuth Subsalicylate as its active ingredient, at a concentration of 262 milligrams per 15 milliliters, in a 240 ml bottle, sala-flavored, sugar-free. It is a household remedy used worldwide to relieve acute digestive symptoms.

Once swallowed, bismuth subsalicylate splits in the stomach into bismuth and salicylic acid. The bismuth component has mild antibacterial action that reduces bacteria attaching to the stomach lining, while salicylic acid inhibits inflammation-triggering enzymes and reduces fluid secretion into the intestine, which lessens loose stools.

Because it acts mainly at the local level of the digestive lining rather than systemically like antibiotics, Gastro Bismol follows the same well-established bismuth subsalicylate formula sold worldwide for several decades.

Gastro Bismol relieves common digestive complaints: acute diarrhea, traveler's diarrhea, heartburn, bloating, indigestion, and nausea caused by contaminated food or mild food poisoning.

It suits adults and adolescents aged 12 and above with temporary symptoms — not chronic or severe diarrhea. If you have a high fever, bloody stools, or symptoms lasting more than 2 days, see a doctor instead of continuing self-treatment.

It's especially popular with travelers heading to regions with unfamiliar food hygiene standards, since it can relieve both diarrhea and heartburn that often show up together on the same trip.

Adults and adolescents 12 years and above: Shake the bottle well before each use, take 30 ml (2 tablespoons) every 30-60 minutes as needed, up to a maximum of 8 doses in 24 hours (240 ml/day).

For traveler's diarrhea, do not use continuously for more than 3 weeks. It can be taken before or after food. Stop once symptoms improve — unlike antibiotics, there's no need to finish the bottle.

Use a proper dosing cup or standard tablespoon to measure the 30 ml dose accurately — eyeballing the amount can lead to too little or too much, affecting how well it relieves symptoms.

Common, harmless side effects: temporary black stools and a grayish-black tongue, caused by bismuth subsalicylate reacting with sulfur in the gut to form bismuth sulfide. This resolves on its own within a few days of stopping and is not dangerous.

Other possible effects include mild nausea, constipation, and a bitter taste. If you experience a severe allergic reaction — hives, difficulty breathing — or ringing in the ears (a sign of salicylate overdose), stop the medicine and see a doctor immediately.

If you're worried black stool could signal gastrointestinal bleeding, there's a visual clue: bismuth-related black stool is usually dry and ash-like, unlike blood-tinged stool, which tends to be sticky, tarry, and distinctly odorous. If unsure, check with a pharmacist.

Do not use: if allergic to aspirin or salicylates, in those with bleeding disorders or taking blood thinners, and in children/teens with flu-like or chickenpox symptoms, since salicylates raise the risk of Reye's syndrome, a serious brain and liver condition.

Use with caution: patients with kidney disease or gout, and pregnant or breastfeeding women should consult a doctor or pharmacist first. Not recommended for children under 12. Avoid combining continuously with aspirin or NSAID painkillers without pharmacist advice, as this raises the risk of stomach irritation.

Gastro Bismol (Bismuth Subsalicylate) is a liquid antidiarrheal with mild antibacterial and anti-inflammatory action. Compared to other options in store:

• Erfuzide (Nifuroxazide) — a capsule that specifically targets intestinal bacteria, suited for diarrhea clearly suspected to be bacterial
• Imodium (Loperamide) — works by directly slowing gut motility for fast relief, but is less suited to infectious diarrhea where the body needs to clear the pathogen

Quick summary: traveler's diarrhea or mild food poisoning with heartburn — choose Gastro Bismol; clearly suspected bacterial infection — choose Erfuzide; need the fastest stop to loose stools in an urgent situation — choose Imodium

Gastro Bismol contains a salicylate, so it should not be combined continuously with aspirin or NSAID painkillers (such as Ibuprofen or Naproxen), as this raises the risk of stomach irritation and gastrointestinal bleeding — the same caution applies to blood thinners like Warfarin, which may have an additive effect.

Bismuth may also interfere with the absorption of certain antibiotics, such as Tetracycline; if taking both is necessary, space doses at least 2 hours apart. Always tell your pharmacist if you're taking gout medication, diabetes medication, or blood thinners before starting Gastro Bismol.

Diabetic patients using certain urine glucose test kits should be aware that bismuth can temporarily interfere with test accuracy. If you're unsure how to interpret a test result, let your doctor or pharmacist know you're taking Gastro Bismol.

Gastro Bismol begins relieving symptoms within 30-60 minutes of taking it, since bismuth subsalicylate breaks down and acts locally on the stomach and intestinal lining fairly quickly — which is why doses can be repeated every 30-60 minutes if symptoms persist.

For general diarrhea, most people see improvement within the first 1-2 days of use. If using it to prevent traveler's diarrhea, start on the first day of travel so the medicine provides continuous protection.

Where Can I Buy Gastro Bismol?

Order online from Intimo Life for nationwide delivery across Thailand in 1-3 business days, discreetly packed with no product name shown on the parcel, so your order stays private from doorstep to delivery.