H2 Blocker (Antacid/Acid Reducer)
Last reviewed July 2026
Who is this for?
Ranitidine is a drug that reduces the amount of acid your stomach produces, giving your stomach lining time to heal and relieving heartburn and ulcer pain.
Blocks histamine H2 receptors on gastric parietal cells, inhibiting gastric acid secretion and reducing intragastric acidity to promote ulcer healing and prevent acid-related mucosal damage.
Stomach ulcer, heartburn, acid reflux (when stomach acid flows back into your throat), excess stomach acid, ulcer caused by too much painkillers
Available Over The Counter
Get this from any pharmacy or chemist: no prescription needed.
Explore this drug
If you miss a dose, take it as soon as you remember. But if it is almost time for your next dose, skip the missed one and continue your regular schedule. Do not take two doses at once to make up for it.
Only buy ranitidine from a licensed pharmacy, avoiding roadside sellers or open market drugs as they may contain harmful impurities. Do not use ranitidine for more than 2 weeks for heartburn without seeing a doctor, as it may be hiding a more serious condition. Because of past global safety concerns with ranitidine, your doctor may recommend alternatives like omeprazole, so always discuss this with your healthcare provider.
Ranitidine can reduce how well ketoconazole (antifungal) works if taken together, so space them apart. It may increase the effect of blood thinners like warfarin, so inform your doctor if you use one. Avoid drinking alcohol while on ranitidine as it can worsen stomach acid and irritation.
Check your specific combination
Is it safe to take Ranitidine with your other drugs?
Ranitidine crosses to the baby during pregnancy and passes into breast milk, so do not use it during pregnancy or breastfeeding unless your doctor specifically tells you it is safe.
Store in a cool, dry place away from direct sunlight and heat. Nigerian weather can be very hot, so avoid storing it near windows or in your car. Keep the drug in its original container and far out of children's reach.
For information only: not medical advice. Always talk to a doctor or pharmacist before changing your medication.
Names this drug is sold under, especially in Nigerian and West African pharmacies
Tap a brand for packaging, NAFDAC details and authenticity check
Counterfeit Drug Warning
Fake drugs are a serious problem in Nigeria. Always buy from a registered pharmacy. If the packaging looks different from what is described above, do not use it.