Ranitidine (Zantac): why it was withdrawn and what is used instead

Ranitidine belongs to a group of medicines called H2 receptor antagonists, often shortened to H2 blockers. The NHS describes it as a medicine that reduced the amount of acid the stomach makes. Zantac was the best-known brand name.

The NHS says it was used for indigestion, heartburn and acid reflux, gastro-oesophageal reflux disease (GORD), which is when you keep getting acid reflux, and to prevent and treat stomach ulcers. It belonged to the H2 receptor antagonist group, the same group as famotidine, which the NHS still names as an option.

The NHS states plainly that ranitidine is not currently available in the UK or globally. It has been discontinued as a precaution because it may contain a small amount of an impurity that has been linked to an increased risk of cancer in animals. The page says it is not yet known whether it will be available again in future.

That wording is worth reading carefully. It describes a precaution and a potential risk identified in animal studies; it does not say that people who took ranitidine have been shown to have developed cancer because of it. If you took ranitidine in the past and are worried, the sensible step is to speak to a GP or pharmacist, who can discuss your own situation.

The NHS advice is to talk to a pharmacist or doctor if you have indigestion, heartburn or acid reflux, because there are similar medicines they can recommend if you need treatment.

The NHS heartburn and acid reflux page says simple lifestyle changes can help: eating smaller, more frequent meals, trying to lose weight if overweight, finding ways to relax, avoiding trigger foods, not eating within 3 or 4 hours before bed, avoiding tight clothing, not smoking and not drinking too much alcohol, and raising the head of the bed by 10 to 20 cm using blocks rather than extra pillows.

A pharmacist can help if you keep getting heartburn and may recommend antacids or alginates, which ease symptoms in the short term but do not cure the problem and should not be taken regularly for long periods. The NHS says to see a GP if lifestyle changes and pharmacy medicines are not helping, if you have heartburn most days, or if you also have other symptoms such as food getting stuck in the throat, frequently being sick or losing weight for no reason.

A GP may prescribe a proton pump inhibitor (PPI), such as omeprazole or lansoprazole, which reduces how much acid the stomach makes, usually for 4 or 8 weeks depending on severity, and you should go back if symptoms return, as you may need a long-term prescription. The NHS adds that if a PPI does not help, a doctor may suggest an H2 receptor antagonist such as famotidine, which is in the same class that ranitidine belonged to.

For severe or persistent symptoms, a GP may refer you to a specialist for tests such as a gastroscopy, tests for the bacteria that can cause heartburn, or occasionally surgery.

Because ranitidine was also used for stomach ulcers, it is useful to know what ulcer treatment looks like now. The NHS says the main causes of stomach ulcers are infection with Helicobacter pylori bacteria and regular use of anti-inflammatory painkillers such as ibuprofen, and that ulcers are more common in people who smoke and become more likely with age.

Treatment depends on the cause. The NHS says you may be offered antibiotics for H. pylori and medicines to reduce stomach acid such as proton pump inhibitors, usually for 1 week to 2 months, with tests afterwards to make sure it has worked. If symptoms come back, speak to a GP, since you may need a different medicine or a longer course.

Warning signs matter. Ask for an urgent GP appointment or call NHS 111 if tummy pain is getting worse, you have lost your appetite, feel full after very little food, are losing weight without trying, have a lump in the tummy, find swallowing painful, keep vomiting or feel tired all the time. Call 999 or go to A&E if you vomit bright red blood or something like ground coffee, your poo is black, sticky and very smelly or has blood in it, you have severe tummy pain, or sudden chest pain.

If your symptoms were controlled on ranitidine, tell your GP or pharmacist that you now need an alternative, and say how often you needed it and for how long. The NHS says there are similar medicines they can recommend for indigestion, heartburn and acid reflux.

Check any anti-inflammatory painkillers you take, because the NHS says ibuprofen and aspirin can make indigestion worse and should not be taken unless prescribed. If you are taking them regularly, ask whether there is a safer option for you.

If you have new alarm symptoms such as difficulty swallowing, weight loss, vomiting blood or black stools, see a doctor promptly rather than trying another over-the-counter remedy, as the NHS indigestion advice lists these as signs of something more serious.

Heartburn and ulcer treatment is managed in primary care on the NHS, with referral for gastroscopy where indicated. Private gastroenterology clinics use the same medicines and tests. Because ranitidine is unavailable everywhere, there is no NHS-versus-private difference in access to it.