Nexipraz is esomeprazole — a proton pump inhibitor that reduces stomach acid — in 20 mg and 40 mg tablets, an over-the-counter 20 mg, and an injection. It is used for reflux and heartburn, healing oesophagitis and ulcers, and protecting the stomach during long-term anti-inflammatory use.
What is Nexipraz?
The South African Medicine Price Registry lists Nexipraz in four forms, all containing esomeprazole:
| Product | Schedule | Strength |
|---|---|---|
| Nexipraz OTC | S2 | 20 mg tablet |
| Nexipraz | S4 | 20 mg tablet |
| Nexipraz | S4 | 40 mg tablet |
| Nexipraz IV powder for solution | S4 | 40 mg injection |
The 20 mg exists in two schedules. The S2 version is sold from a pharmacy for short-term heartburn, typically a two-week course; the S4 version is prescription-only for longer or more serious treatment. Identical medicine, different route and duration.
Esomeprazole is a proton pump inhibitor (PPI). The cells lining the stomach carry a molecular pump that moves acid into the stomach; esomeprazole switches those pumps off permanently, and production resumes only as the cell manufactures new ones over a day or two.
What distinguishes esomeprazole from omeprazole is the reason it exists. Omeprazole is a mixture of two mirror-image forms; esomeprazole is the S-isomer alone. The liver breaks it down more slowly and predictably, so levels are higher and vary less between people. It gives somewhat more reliable acid suppression, particularly at 40 mg — though the difference in everyday reflux is modest, and generic omeprazole costs considerably less.
Two practical consequences of the mechanism, both commonly missed:
It is not an antacid and does not work in minutes. It reduces acid being made, taking a day or two for full effect. For symptoms right now, an antacid such as Gaviscon is what helps.
Take it before food. The pumps are most active when a meal is coming, so 30 to 60 minutes before breakfast catches them at their peak. Taken with or after food it works considerably less well — the commonest reason a PPI appears not to be working.
Esomeprazole is also sold as Nexiam, Esomep and others. See also Prazoloc and Pantoprazole MR, which contain the related pantoprazole.
What is Nexipraz commonly used for?
- Gastro-oesophageal reflux disease (GORD) — heartburn, acid rising into the throat, burning behind the breastbone. Its commonest use.
- Healing erosive oesophagitis, where reflux has inflamed or eroded the lining of the oesophagus. This is where the 40 mg is typically used.
- Maintaining healing and preventing relapse, usually at 20 mg, and healing stomach and duodenal ulcers.
- **As part of Helicobacter pylori eradication**, alongside two antibiotics. H. pylori causes most ulcers, and clearing it usually cures them permanently.
- Protecting the stomach in people on long-term anti-inflammatories — a common reason for the 20 mg.
- After a bleeding ulcer, where the injection is used in hospital, and in Zollinger-Ellison syndrome.
- Short-term self-treatment of frequent heartburn, using the OTC 20 mg.
Two things worth knowing:
Courses are often meant to be finite. Reflux and ulcers are commonly treated for four to eight weeks, then stopped or stepped down. If you have been taking a PPI over a year without a discussion, ask whether it is still needed.
Stopping suddenly after long use causes rebound acid. The stomach compensates by making extra pumps, so stopping dead means a week or two of worse symptoms. That is rebound, not the original problem returning — and mistaking one for the other is how people conclude they can never come off.
Lifestyle measures genuinely help: smaller meals, not lying down within three hours of eating, raising the head of the bed, losing excess weight, and cutting back alcohol, smoking and trigger foods.
How Nexipraz fits into this medicine category
| Group | Examples | How it works |
|---|---|---|
| Proton pump inhibitors | Esomeprazole (Nexipraz), omeprazole, pantoprazole, dexlansoprazole | Shut down acid production; strongest, slowest |
| H2 blockers | Famotidine, cimetidine | Reduce acid; weaker but faster |
| Antacids | Gaviscon, Rennies | Neutralise acid present; act in minutes |
| Alginates | Gaviscon | Raft over stomach contents |
| Antispasmodics | Hyoscine (Hyospasmol) | Cramping, not acid |
| Anti-nausea | Metoclopramide (Adco-Contromet) | Nausea and stomach emptying |
See the digestive and stomach medicines hub.
What to check before using Nexipraz
Tell your doctor or pharmacist if you:
- Have liver disease, where the dose may need limiting.
- Take HIV medicines, particularly atazanavir, rilpivirine or nelfinavir. Reduced stomach acid substantially lowers their absorption — this interaction matters clinically.
- Take clopidogrel. Esomeprazole and omeprazole inhibit the enzyme that activates it, and this interaction is more relevant for these two than for pantoprazole. Tell your doctor, who may prefer a different PPI.
- Take warfarin, methotrexate, digoxin, citalopram, phenytoin, tacrolimus, or antifungals such as ketoconazole or itraconazole.
- Take iron supplements or vitamin B12 — long-term acid suppression reduces absorption of both.
- Have osteoporosis or an elevated fracture risk.
- Are due for a gastroscopy or an ***H. pylori* breath test.** PPIs cause false negatives and are usually stopped around two weeks beforehand.
- Are pregnant or breastfeeding.
Do not treat alarm symptoms with acid suppression. See a doctor promptly rather than starting or continuing a PPI if you have difficulty or pain swallowing, unintentional weight loss, persistent vomiting, vomiting blood, black tarry stools, or anaemia, or if new indigestion begins over the age of 45 to 50. A PPI can quieten the symptom while something more serious continues underneath — the main risk of easy over-the-counter access.
Practical points:
- Take it 30 to 60 minutes before breakfast, once daily unless told otherwise.
- Swallow the tablet whole; do not crush or chew it.
- Complete the course even once symptoms settle — the lining takes weeks to heal.
- If using the OTC version, do not continue beyond the pack’s stated duration without advice.
Possible cautions and when to ask a pharmacist or doctor
Esomeprazole is generally well tolerated. Common effects are headache, diarrhoea, constipation, wind, nausea and abdominal pain, usually mild.
Longer-term use carries recognised but modest risks: low magnesium, reduced vitamin B12 and iron absorption, a small increase in fracture risk, and more gut infections including C. difficile, since stomach acid is part of the body’s defence. These are reasons to review the need periodically, not to stop a PPI that is required.
Seek medical advice promptly for:
- Severe or persistent diarrhoea, especially watery or bloody, or with fever.
- Muscle cramps, twitching, palpitations, weakness or unsteadiness — possible low magnesium, developing over months to years.
- A rash, particularly on sun-exposed skin, or a rash with joint pain.
- Reduced urine output, swelling, or unusual tiredness — possible kidney inflammation.
- Any alarm symptom listed above.
Get emergency help for vomiting blood, black tarry stools, severe chest pain, or swelling of the face, lips or tongue with difficulty breathing.
Chest pain deserves a separate word. Reflux and cardiac pain feel similar. Do not assume new or severe chest pain is heartburn — particularly with breathlessness, sweating, nausea, pain spreading to the arm, neck or jaw, or onset on exertion. Get it assessed.
Contact your doctor if symptoms do not improve within two to four weeks, if they return quickly after a course, if you have been taking a PPI more than a year without review, or if you want to stop after long use — so it can be reduced gradually.
Related medicine guides
Frequently asked questions
What is Nexipraz 40 mg used for? Reducing stomach acid — healing erosive oesophagitis, treating reflux and ulcers, as part of H. pylori treatment, and in Zollinger-Ellison syndrome. It contains esomeprazole.
What is Nexipraz 20 used for? Reflux and heartburn, maintaining healing, and stomach protection alongside long-term anti-inflammatories. The over-the-counter version is for short-term frequent heartburn.
Why are there two versions of the 20 mg? The S2 is sold from a pharmacy for short-term use; the S4 is prescription-only for longer treatment. Same medicine.
How is esomeprazole different from omeprazole? It is the single active mirror-image form of omeprazole, broken down more slowly and predictably. Acid suppression is somewhat more reliable; generic omeprazole is considerably cheaper.
When should I take it? Thirty to sixty minutes before breakfast. Taken with or after food it works considerably less well.
How long before it works? A day or two for full effect. An antacid helps in the meantime.
Can I take it with clopidogrel? Tell your doctor. Esomeprazole can reduce clopidogrel’s activation, and pantoprazole may be preferred.
Can I stop when I feel better? Complete the prescribed course. After long-term use, step down gradually — stopping suddenly causes a rebound of extra acid.