(Potassium hydrogen carbonate/sodium alginate)

Antacids work by neutralising the acid in your stomach. They also create a protective barrier at the top of your stomach to prevent reflux symptoms like heartburn.

Takes effect in
30 minutes
How well it works
Antacids are up to 60% effective in managing short term reflux symptoms.
Price starts from
£18.00 / bottle
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Our promise

If you’re new to Numan, here’s how we do things.


We’re regulated by the Care Quality Commission.


All our deliveries are free, discreet, and usually arrive within 24 hours.


Our team of clinicians and health experts can support you along every step of your treatment journey.

How antacids work

Antacids are made up of basic salts, which work to neutralise the acid in your stomach that cause reflux symptoms. They provide fast relief for reflux symptoms that occur occasionally or last for less than 7 consecutive days. For symptoms that last longer, you should speak with a clinician to rule out any underlying conditions that may be the cause.

How Numan works

It’s healthcare without the hassle.

Free online consultation

Free online consultation

Once complete, your consultation will be reviewed by our clinicians. Most prescriptions are approved the same day.

Continuous care

Continuous care

Have any questions or want to change your medication? Speak to our clinicians and they’ll be able to help.

Free 24-hour delivery

Free 24-hour delivery

If your treatment is approved, it’ll be posted to you discreetly within 24 hours.

Cancel anytime

Cancel anytime

If you’re not happy with the service, or simply don’t need treatment anymore, you can cancel anytime.

Antacids: facts you need to know

Straightforward answers to frequently asked questions.