Zantac 150mg Tablets (14)
Zantac 150mg Tablets (14-pack) provide fast and lasting relief from heartburn, acid reflux and indigestion. The acid-reducing tablets work within minutes and last up to 12 hours, suitable for both daytime symptoms and night-time relief.
What is Zantac 150mg Tablets (14-pack)?
Zantac 150mg Tablets are a Schedule 2 acid-reducing medicine used for the relief of heartburn, acid indigestion and sour stomach. The active ingredient is an H2 receptor antagonist that reduces the amount of acid your stomach produces, providing relief that lasts up to 12 hours. The 14-tablet pack covers a short-term course or as-needed use during flare-up periods.
What Zantac 150mg treats
- Heartburn - burning chest sensation after meals.
- Acid indigestion (dyspepsia) - upper-abdominal discomfort.
- Sour stomach and acid-related belching.
- Night-time reflux disturbing sleep.
- Reflux triggered by spicy, fatty or acidic foods.
- Symptom prevention before known trigger meals.
How Zantac works
Zantac belongs to a class of medicines called H2 receptor antagonists. By blocking histamine-2 receptors on the acid-producing cells of the stomach, it reduces baseline and meal-stimulated acid secretion. Lower stomach acidity means less acid washing up into the oesophagus during reflux, which relieves the burning sensation and prevents oesophageal lining irritation.
How to take Zantac 150mg
- Swallow one tablet whole with a full glass of water.
- For prevention before known trigger meals: take 30-60 minutes before eating.
- For relief of existing symptoms: take as soon as symptoms start.
- Maximum dose: 2 tablets per 24 hours.
- Do not take continuously for more than 14 days without consulting a doctor.
Lifestyle measures to combine with Zantac
- Eat smaller meals more frequently rather than large meals.
- Avoid eating within 2-3 hours of bedtime.
- Raise the head of the bed 10-15cm (under the mattress).
- Avoid common triggers: spicy food, fatty food, citrus, tomato, chocolate, coffee, alcohol.
- Stop smoking - nicotine relaxes the lower oesophageal sphincter.
- Lose excess weight - abdominal pressure worsens reflux.
For broader cold/flu and digestion advice see our cold and flu first aid guide.
Warnings and precautions
- Do not exceed 2 tablets per 24 hours.
- If symptoms persist beyond 14 days, consult your doctor.
- Tell your pharmacist about other medicines you are taking - H2 blockers can affect how some medicines are absorbed.
- Do not use if you have severe kidney disease without medical advice.
- Consult your doctor before using if pregnant or breastfeeding.
- Seek immediate medical attention for severe abdominal pain, vomiting blood, black tarry stools, difficulty swallowing or unexplained weight loss - these can indicate serious conditions.
- Keep out of reach of children.
- Store below 25 degrees Celsius in a dry place.
Related products
- For fast-onset symptom relief during a flare: Salvital Effervescent Powder - traditional antacid drink.
- For dehydration symptoms during gastro illness: Hydralyte Ice Blocks.
- Browse our full first aid supplies range.
Frequently asked questions
What is Zantac 150mg used for?
Zantac 150mg Tablets are used for the relief of heartburn, acid indigestion, sour stomach and pain associated with these symptoms. They reduce stomach acid production for up to 12 hours, making them useful for both daytime symptom flare-ups and night-time acid reflux.
How quickly does Zantac work?
Zantac 150mg starts reducing stomach acid within 30-60 minutes of swallowing. The maximum acid-reducing effect develops over the first 2-3 hours and continues for up to 12 hours. For fastest relief from an active heartburn episode, antacids work in seconds; Zantac works alongside antacids for longer-lasting control.
Can I take Zantac with food?
Yes - Zantac can be taken with or without food. For prevention of heartburn triggered by specific meals, take 30-60 minutes BEFORE the meal. For relief of existing symptoms, take as soon as symptoms occur. Maximum 2 tablets per 24 hours unless otherwise directed by your pharmacist or doctor.
How long can I take Zantac for?
Zantac 150mg is intended for short-term symptom relief (up to 14 days continuous use). If heartburn, indigestion or reflux persists beyond 2 weeks, see your doctor - persistent symptoms can indicate gastroesophageal reflux disease (GORD), peptic ulcer or other conditions needing investigation and longer-term management.
Is Zantac safe in pregnancy?
Consult your doctor or midwife before using Zantac during pregnancy or breastfeeding. While H2-blocker reflux medicines are commonly used in pregnancy under medical supervision, your healthcare team will weigh the benefits against any risks for your specific situation. Avoid self-medicating reflux symptoms during pregnancy without clinical advice.
Sources: healthdirect.gov.au — Heartburn, Therapeutic Goods Administration (TGA), healthdirect.gov.au — GORD.