Prazoloc is pantoprazole — a proton pump inhibitor that reduces stomach acid. It is used for reflux and heartburn, healing stomach and duodenal ulcers, and protecting the stomach lining during long-term anti-inflammatory use. It comes as 20 mg and 40 mg tablets, an over-the-counter 20 mg, and an injection.
What is Prazoloc?
The South African Medicine Price Registry lists Prazoloc in four forms, all containing pantoprazole:
| Product | Schedule | Strength |
|---|---|---|
| Prazoloc OTC | S2 | 20 mg tablet |
| Prazoloc | S4 | 20 mg tablet |
| Prazoloc | S4 | 40 mg tablet |
| Prazoloc powder for solution | S4 | 40 mg injection |
The 20 mg appears in two schedules, which confuses people. The S2 version is sold from a pharmacy for short-term heartburn, typically as a two-week course. The S4 version is prescription-only for longer or more serious treatment. Identical medicine; different route and different duration of use.
Pantoprazole is a proton pump inhibitor (PPI). The cells lining the stomach have a molecular pump that moves acid into the stomach. Pantoprazole switches those pumps off permanently — acid production resumes only as the cell manufactures new ones over a day or two.
Two practical consequences follow from that mechanism.
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 is what helps while the PPI settles in.
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 most active. Taken with or after food it works considerably less well — this is the single commonest reason a PPI appears not to be working.
Prazoloc, Pantor, Pantoloc, Panloc, Zurcal and Pantoprazole MR all contain pantoprazole. Being dispensed a different brand is ordinary generic substitution. See also Pantoprazole MR, the modified-release form.
The injection is used in hospital where someone cannot swallow, or in significant upper gastrointestinal bleeding.
What is Prazoloc commonly used for?
- Gastro-oesophageal reflux disease (GORD) — heartburn, acid rising into the throat, burning behind the breastbone. Its most common use.
- Healing oesophagitis, where reflux has inflamed the lining of the oesophagus.
- Stomach and duodenal ulcers, to heal them.
- **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 or other ulcer-risk medicines — a common reason for the 20 mg.
- 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 frequently treated for four to eight weeks, then stopped or stepped down. PPIs get repeated on prescription for years without review far more often than they should be. If you have been on one over a year without discussion, ask whether it is still needed.
Stopping suddenly after long use causes rebound acid. The stomach compensates for suppressed acid by making more pumps, so stopping dead means a week or two of worse symptoms. That is rebound, not the original problem returning — which is why long-term users should step down gradually rather than stop abruptly.
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 Prazoloc fits into this medicine category
| Group | Examples | How it works |
|---|---|---|
| Proton pump inhibitors | Pantoprazole (Prazoloc), omeprazole, esomeprazole, 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 Prazoloc
Tell your doctor or pharmacist if you:
- Have liver disease, where the dose may need reducing.
- Take HIV medicines, particularly atazanavir or rilpivirine — reduced stomach acid substantially lowers their absorption. This interaction matters clinically.
- Take warfarin, methotrexate, digoxin, clopidogrel, or antifungals such as ketoconazole or itraconazole.
- Take iron supplements or vitamin B12 — long-term acid suppression reduces absorption of both.
- Have osteoporosis or fracture risk.
- Are due for a gastroscopy or an H. pylori breath test. PPIs mask changes and cause false negatives; they are usually stopped around two weeks beforehand.
- Are pregnant or breastfeeding.
Do not treat alarm symptoms yourself 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 — this is the main risk of easy access to the over-the-counter version.
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
Pantoprazole 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 genuinely 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 separate mention. 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 Prazoloc 40 used for? Reducing stomach acid — for reflux and heartburn, healing stomach and duodenal ulcers, as part of H. pylori treatment, and in Zollinger-Ellison syndrome. It contains pantoprazole.
What is Prazoloc 20 used for? The same purposes at a lower strength — commonly maintenance treatment, stomach protection alongside anti-inflammatories, and short-term heartburn in the over-the-counter version.
Why are there two versions of the 20 mg? The S2 is sold from a pharmacy for short-term heartburn; the S4 is prescription-only for longer treatment. Same medicine.
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 crush the tablet? No. Swallow it whole.
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.
Is Prazoloc the same as Pantoloc or Pantor? All contain pantoprazole. Different manufacturers, same active ingredient.
Is long-term use safe? For people who need it, generally yes, but it should be reviewed. Long-term use is linked to low magnesium, reduced B12 and iron absorption, and small increases in fracture and gut infection risk.