Proton pump inhibitors (PPIs) — patient guide

This page covers all the medicines in the proton pump inhibitor family. If your medicine’s name ends in -prazole, this is your page.

Have you been on this for years, wondering if you still need it? Or did your doctor just start you on a short course and you want to understand what’s actually happening in your gut? Both readers belong here — and the answers run in different directions. The single most useful thing anyone on a PPI can do is know which conversation they’re in.

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Find your medicine

Generic name	Common brand names	Strengths	How often
Omeprazole	Losec, Acimax, Maxor, Probitor, Ozmep, generics	10 / 20 / 40 mg	Once daily (twice for some indications)
Esomeprazole	Nexium, Nexium Hp7 (combo pack), generics	20 / 40 mg	Once daily (twice for some indications)
Pantoprazole	Somac, Topzol, generics	20 / 40 mg	Once daily (twice for some indications)
Lansoprazole	Zoton, Zoton FasTab, Solox, generics	15 / 30 mg	Once daily (twice for some indications)
Rabeprazole	Pariet, generics	10 / 20 mg	Once daily (twice for some indications)
Dexlansoprazole	Dexilant	30 / 60 mg	Once daily

OTC small packs. Omeprazole and esomeprazole are available over the counter in small pack sizes (e.g. Losec 1-2-Go) for short-term self-management of heartburn. The same long-term safety conversation applies regardless of whether the script came from a GP or the pharmacy aisle.

Closely related families.

• H2-receptor antagonists — names end in -tidine. Famotidine is the main one still on the AU market (ranitidine was withdrawn). Weaker acid suppression than PPIs; useful as a step-down during a PPI taper or for on-demand relief.
• Antacids and alginates — Gaviscon, Mylanta, Quick-Eze. Symptomatic relief in minutes; no impact on the underlying acid production.

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What it treats

PPIs are prescribed for more than one situation, and the duration of the course depends on which one.

• Reflux (GORD / heartburn) — typical course 4–8 weeks. After symptom relief, step down to the lowest effective dose or on-demand use. Long-term continuous use needs a documented reason.
• Peptic ulcer disease — 4–8 weeks to heal, often longer if H pylori was involved or NSAIDs continue.
• NSAID-induced ulcer prevention — ongoing while the NSAID continues, especially if you are over 65, have prior ulcer history, or are on an anticoagulant / antiplatelet.
• H pylori eradication — 7–14 days as part of a combination pack (eTG current regimen). Usually a urea breath test or stool antigen 4–8 weeks later confirms eradication.
• Erosive oesophagitis — induction with a higher PPI dose for 8 weeks, then maintenance long-term.
• Barrett’s oesophagus — ongoing acid suppression under gastroenterology guidance.
• Zollinger-Ellison syndrome — specialist-managed, high-dose, indefinite.
• Eosinophilic oesophagitis — induction and maintenance; gastroenterology-led, off-label on TGA labelling for most PPIs but increasingly mainstream.

The category split that matters most: short healing course (most patients) versus long-term maintenance (a much smaller, defined group). The flyer below is honest about both.

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The basics

1. Take it 30–60 minutes before food, usually breakfast — PPIs need active acid pumps to inhibit, and acid pumps activate with the meal. Twice-daily dosing: before breakfast and before the evening meal.
2. Go to ED for vomiting blood, black tarry stools, severe abdominal pain, sudden facial swelling, or new chest pain.
3. Don’t stop cold turkey after 8+ weeks of continuous use. Plan a taper with your GP. Expect 1–2 weeks of rebound symptoms that settle — that’s not relapse.

Everything else — long-term safety, deprescribing, integrative options — is below.

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What’s different about PPIs (and what isn’t)

The honest answer is: less than the marketing suggests. All six PPIs work by the same mechanism — they irreversibly bind the stomach’s H+/K+ ATPase (the acid pump on the parietal cell). At standard doses, acid suppression is broadly equivalent across the class. The differences that matter clinically are:

• CYP2C19 interaction profile. Omeprazole and esomeprazole inhibit this liver enzyme more than the others. This matters most for clopidogrel — the anti-clotting drug used after stents and heart attacks — because clopidogrel needs CYP2C19 to convert to its working form. Pantoprazole and rabeprazole are the conventional pairings if dual antiplatelet therapy is in the picture. The clinical-event signal from COGENT (NEJM 2010) is modest and mixed, but cardiology generally prefers the lower-interaction PPIs when there’s a choice.
• Formulation. Lansoprazole has an orodispersible FasTab — useful if swallowing tablets is difficult, or for NG-tube delivery. Dexlansoprazole has a dual-release capsule designed for two acid peaks per dose; reasonable for breakthrough nocturnal symptoms.
• PBS access and cost. Most PPIs are PBS Streamlined Authority. Dexlansoprazole is typically a private script — confirm with your pharmacist.

For most patients with uncomplicated reflux, the specific choice of PPI matters less than getting the duration right.

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Tap any section below to expand the detail.

How does it work?

Your stomach makes acid through a structure called the H+/K+ ATPase — the “proton pump” — sitting on the surface of specialised cells (parietal cells) in the stomach lining. The pump activates when food arrives; it pumps protons (acid) into the stomach in exchange for potassium.

PPIs are irreversible inhibitors. Once a PPI molecule binds an active pump, that pump is offline until the parietal cell makes a replacement, which takes about 24 hours. That’s why most PPIs are dosed once daily despite a short blood half-life — the effect lasts a day even though the drug itself is cleared within hours.

It also explains the timing rule: take the PPI before a meal, because pumps that aren’t active aren’t bound by the drug, and the meal is what wakes them up. Take a PPI at bedtime on an empty stomach and you get markedly less acid suppression.

The same biology explains why stopping abruptly causes rebound. While you were on the PPI, the stomach’s regulatory system was sensing low acid and quietly upregulating the parietal cells — more cells, more pumps. When the brake comes off, the upregulated machinery overshoots for a couple of weeks before resetting. This is real, predictable physiology, not a relapse of your original condition. Knowing this is the difference between a successful deprescribe and a permanent prescription.

Side effects in detail

Common (usually mild, often settle)

• Headache. Usually first 1–2 weeks.
• Nausea, abdominal discomfort, diarrhoea or constipation. Often settle; sometimes a different PPI within the class is tolerated better.
• Taste changes. Uncommon, usually reversible.

Less common but worth knowing

• Magnesium deficiency — rare but real with long-term high-dose use. People often experience muscle cramps, twitching, paraesthesia, or palpitations. Measure serum magnesium if these appear.
• Vitamin B12 deficiency — after 12+ months of continuous PPI. Often presents as fatigue, brain fog, or paraesthesia. Annual measurement after 12 months is a reasonable cadence.
• Iron deficiency — particularly in menstruating women, vegetarians, or the elderly. Acid helps non-haem iron absorption.
• Fundic gland polyps — small benign polyps in the stomach that can develop with long-term PPI use. Common, almost always benign in non-FAP patients, and not in themselves a reason to stop.

Rare but serious — get medical attention

• Acute interstitial nephritis — idiosyncratic, can happen at any duration, presents as unexplained rise in creatinine or new urinary findings. Stops on PPI cessation; sometimes needs steroid treatment. Mention any unexplained kidney function change to your GP.
• Severe diarrhoea, especially with antibiotic exposure — Clostridioides difficile risk is modestly increased. Persistent watery diarrhoea after antibiotics needs investigation.
• Hypersensitivity rash, fever, or swelling — cross-reactivity within the class is reported; don’t simply switch to another PPI after a hypersensitivity reaction without medical guidance.

NPS MedicineWise PPI consumer guide and the AMH PPI monograph cover this in more detail.

The long-term safety conversation — what the evidence actually shows

This is the part most patients want a straight answer on, and the honest answer is both-and. Several large observational studies have associated long-term PPI use with small increased relative risks of various harms. The studies are real. They are also observational, which means the people on long-term PPIs differ from the people who aren’t in ways that the analyses can’t fully untangle. Hold both of these in your head: the signals exist, AND the evidence is signal, not proof.

What the literature actually shows:

• Kidney disease (CKD). Lazarus et al. (JAMA Intern Med 2016) — long-term PPI use associated with ~20–50% relative increase in CKD risk. Observational; confounding by indication is likely. Not by itself a reason to stop a PPI when the indication is genuine.
• Hip and vertebral fracture. Targownik et al. (CMAJ 2008) — modest signal. The reasonable response is the standard osteoporosis-prevention conversation (weight-bearing exercise, vitamin D adequacy, dietary calcium, DEXA if otherwise indicated) — not PPI-specific intervention.
• Dementia. Gomm et al. (JAMA Neurol 2016) raised a signal; subsequent better-controlled analyses have largely not confirmed it. Current evidence does not support stopping a PPI on dementia-risk grounds alone.
• Community-acquired pneumonia. Modest signal in some studies; magnitude debated and likely partially confounded.
• C. difficile infection. Modest increase, larger in the elderly, hospitalised, or recently antibiotic-exposed.
• Hypomagnesaemia. FDA Drug Safety Communication 2011 — real, rare, worth checking if symptomatic.
• Fundic gland polyps. Benign, common with long-term use, do not require surveillance in non-FAP patients.

What this means in practice: the right response to these signals is not panic and not dismissal. The right response is an annual review of indication. If you have a clear reason to be on a PPI long-term — erosive oesophagitis, Barrett’s, ongoing NSAID with high bleeding risk, severe reflux that returns within days each time you stop — the benefit-risk balance favours continuing. If the indication is “I was started on this five years ago and nobody has reviewed it since,” the right step is a planned deprescribe.

Drugs, food, and alcohol

Tell your GP or pharmacist before combining with:

• Clopidogrel — omeprazole and esomeprazole reduce its activation. If you’re on dual antiplatelet therapy after a stent or heart attack, pantoprazole or rabeprazole is the conventional pairing.
• Atazanavir or nelfinavir (HIV antiretrovirals) — PPIs significantly reduce their absorption. Combination should be avoided unless your HIV specialist directs otherwise.
• High-dose methotrexate (oncology setting) — PPIs can delay clearance and prolong toxicity. Low-dose weekly methotrexate (rheumatology) is much less affected.
• Oral ketoconazole, itraconazole (and other pH-dependent antifungals) — PPIs reduce their absorption. Separate dosing or alternative antifungal.
• Warfarin — small INR fluctuations reported, particularly with omeprazole and esomeprazole. Check INR after starting or stopping.
• Digoxin — small increase in absorption; monitor levels if narrow therapeutic range is a concern.
• Tacrolimus, ciclosporin, mycophenolate — transplant-specialist territory.

Food. Take 30–60 minutes before a meal. Specific food triggers for reflux are individual — common offenders include large evening meals, fatty / fried food, spicy food, citrus, tomato-based sauces, chocolate, peppermint, caffeine, and alcohol. Identifying your triggers (food diary for two weeks) often moves the needle more than dose escalation.

Alcohol. Worsens reflux directly. Cutting back is one of the highest-leverage lifestyle changes for GORD.

Generic substitution at the pharmacy. Generics are bioequivalent. Cost differences within the PBS co-payment are usually small; ask the pharmacist for the cheapest equivalent.

Monitoring — what blood tests and when

• Short course (≤ 8 weeks): no routine bloods required.
• Annual review of indication from the start of long-term use — the most important “monitoring” is the conversation about why you’re on it.
• After 12 months continuous use and annually thereafter: serum B12, magnesium, iron studies / ferritin.
• If on long-term use and over 65, or with osteoporosis risk factors: standard osteoporosis-prevention conversation. A DEXA scan is decided on the usual risk-factor grounds, not PPI use alone.
• If creatinine rises unexpectedly: investigate for acute interstitial nephritis among other causes.

Message your GP if you: develop unexplained fatigue, brain fog, paraesthesia, muscle cramps, palpitations, persistent diarrhoea, or new red-flag symptoms (weight loss, swallowing difficulty, GI bleeding).

Deprescribing — how to come off, planned

Coming off a PPI after long-term use is straightforward in principle and often messy in practice — because of rebound. The rebound is the single biggest reason long-term PPI use becomes permanent. Plan around it.

The conversation first. Before the taper, agree with your GP on the indication review. If the answer is “yes, the indication is still active and the benefit-risk favours continuing,” don’t deprescribe. The goal is right-sized prescribing, not zero-PPI as a default.

A reasonable taper protocol (vary with your GP based on what you’re on):

1. Halve the dose for 2 weeks. E.g. esomeprazole 40 mg → 20 mg.
2. Halve again for 2 weeks. E.g. esomeprazole 20 mg → 10 mg (or alternate-day dosing if the half isn’t available).
3. On-demand only for 2 weeks — take a tablet only on days of symptoms.
4. Stop.

Bridging options during the taper window:

• Famotidine 20–40 mg at night — H2 blocker, weaker acid suppression, useful step-down. Less rebound on stopping than PPIs.
• Alginate (Gaviscon-style) after meals and at bedtime — forms a raft on stomach contents to reduce reflux mechanically.
• Antacids for breakthrough symptoms (calcium carbonate, magnesium / aluminium combinations).

What to expect: 1–2 weeks of worse symptoms than baseline. This is the rebound peak. It is not relapse. Pushing through with the bridging options above almost always resolves within 4 weeks. The mistake to avoid is interpreting rebound as proof that you “need” the PPI and restarting at the original dose.

If the taper fails. If symptoms remain severe 4 weeks after stopping and bridging strategies haven’t held, that may reflect a genuine ongoing indication. Restarting the PPI is not a personal failure — it is a useful diagnostic outcome. Some people genuinely need long-term acid suppression, and the right outcome is documented confirmation of the indication, not perpetual ambivalence.

For the operator-level framing, NPS MedicineWise’s deprescribing PPI module is the AU primary tier.

Sick days — do I need to pause?

Unlike some BP medicines (ACE inhibitors, ARBs, diuretics — see the ACE inhibitor flyer), PPIs do not need to be paused for gastro illness, dehydration, or heat illness. They don’t rely on hydration status. Continue your PPI through short illnesses unless your GP advises otherwise.

If you’re on both a PPI and an ACE inhibitor / ARB / diuretic, the pause rule applies to the BP medicine, not the PPI.

Pregnancy and breastfeeding

Reflux is common in pregnancy, particularly third trimester. The order of preference is usually:

1. Lifestyle measures first — smaller more frequent meals, avoid eating 3 hours before lying down, left-side sleeping, head-of-bed elevation.
2. Antacids / alginates — calcium-based antacids and Gaviscon-style alginates have the longest safety record in pregnancy.
3. H2 blocker — famotidine if antacids aren’t enough.
4. PPI if symptoms remain severe. Omeprazole has the largest safety dataset in pregnancy and is generally considered acceptable when an indication is genuine.

If you’re already on a PPI and become pregnant, don’t stop on your own — discuss with your GP whether the indication justifies continuing. Routine long-term PPI use is a reasonable trigger for a use-or-stop conversation in pregnancy.

Breastfeeding. Omeprazole has the most safety data; pantoprazole also has acceptable data. Case-by-case decision.

H pylori — the antibiotic packs

If your PPI came in a foil-blister combination pack with two antibiotics, you’re on H pylori eradication therapy.

Current AU first-line (eTG) is usually a 7-day triple therapy:

• Nexium Hp7 = esomeprazole + amoxicillin + clarithromycin
• Klacid HP7 = lansoprazole + amoxicillin + clarithromycin

Clarithromycin resistance in Australia is rising. Some GPs now prefer bismuth-based quadruple therapy (PPI + bismuth + metronidazole + tetracycline) as first-line, particularly after prior macrolide exposure. Confirm the current regimen with your prescribing GP.

After the seven days:

• The antibiotics stop. The PPI may continue for another 2–4 weeks if there was an ulcer, or stop with the pack if not.
• Urea breath test or stool antigen at 4–8 weeks confirms eradication. Don’t take a PPI in the 2 weeks before the test (it suppresses the test sensitivity) — ask the requesting GP about timing.
• If still positive, second-line therapy substitutes the antibiotics.

If you’re on a combination tablet

• Nexium Hp7 / Klacid HP7 — H pylori eradication packs (see above). Time-limited 7-day course, not ongoing.
• Vimovo — esomeprazole + naproxen, fixed combination for chronic inflammatory pain in patients with increased GI bleeding risk. Convenient but inflexible for dose titration; many GPs prefer separate scripts so each drug can be adjusted independently. Confirm current TGA availability with your pharmacist.

Cost — PBS context

Most PPIs are PBS Streamlined Authority. From 1 January 2026, the PBS co-payment is:

• General patient: up to $25.00 per script
• Concession card holder: up to $7.70 per script

A pattern that triggers a usage review is approximately 10+ PBS PPI scripts per year per patient — this is the NPS deprescribing campaign’s hook. If your prescriptions are rolling on repeat with no documented annual indication review, that’s the conversation to bring to your GP.

Dexlansoprazole (Dexilant) is typically a private script in Australia — confirm pricing with your pharmacist before filling.

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The integrative view

This is where the longer conversation lives. Two principles to hold at once: PPIs work, and they’re well-evidenced for genuine indications. AND the lifestyle and integrative levers are often more important for long-term reflux control than people realise, and they can sometimes do enough work that a PPI becomes unnecessary. Hold both.

Strong evidence — these reliably reduce reflux

These are interventions where the evidence is solid enough to recommend to any patient with GORD.

• Weight loss if BMI is above the healthy range. Visceral adiposity directly raises intra-abdominal pressure and the lower oesophageal sphincter loses its anchor. Even 5–10% body weight loss can meaningfully reduce reflux.
• Avoid eating in the 3 hours before bed. Lying down with a full stomach is reflux’s friend. The single biggest leverage point for nocturnal reflux.
• Elevate the head of the bed by 15–20 cm (4 to 6 inches) — wedge under the mattress or risers under the bed legs. Stacking pillows doesn’t work the same way (you bend at the waist and worsen reflux). Particularly useful for nocturnal symptoms.
• Sleep on your left side. Anatomy favours the right oesophageal-stomach junction sitting above the gastric contents on this side. Small but real effect.
• Smoking cessation — nicotine reduces lower oesophageal sphincter tone.
• Reduce alcohol — particularly evening alcohol, and particularly wine (lowers sphincter tone) and beer (carbonation, volume).
• Identify your trigger foods. Two-week food diary, then targeted reduction. The common offenders — fatty / fried, spicy, citrus, tomato, chocolate, mint, caffeine — are averages, not universals. Yours will be specific.
• Smaller more frequent meals instead of large meals, especially in the evening.

Moderate evidence — likely helpful

• Deglycyrrhizinated liquorice (DGL), 380–760 mg chewed 20 minutes before meals. Mucosal-protective; small-trial signal, mixed quality, generally well-tolerated. Choose the deglycyrrhizinated form — ordinary liquorice can raise blood pressure and lower potassium with prolonged use.
• Slippery elm and marshmallow root — demulcent traditions, mucosal coating, evidence is mostly mechanistic plus long use. Reasonable adjuncts for symptom control during a taper.
• Aloe vera juice (decolourised, low-aloin) — small RCT signal versus ranitidine for symptom relief. Choose the low-aloin / decolourised form — aloin is a laxative anthraquinone you don’t want.
• Probiotics — limited PPI-rescue evidence, more useful for C. difficile prevention and post-antibiotic dysbiosis after H pylori eradication. Multi-strain formulations including Lactobacillus rhamnosus GG and Saccharomyces boulardii have the most data.
• Melatonin (3 mg at night) — small RCT signal for GORD symptom relief, possibly through lower oesophageal sphincter tone. Worth a trial if reflux is nocturnal-dominant and sleep is also disrupted.

Limited or controversial — proceed with care

• Apple cider vinegar (1 teaspoon diluted in water before meals) — counterintuitive (adding acid to a low-acid drinker’s stomach) but a signal exists for the subset of patients whose reflux is actually a low-acid problem rather than high-acid. Hold both: classic high-acid reflux and hypochlorhydric reflux look identical from the outside. ACV can dramatically worsen high-acid reflux. Do not run this trial if you have erosive oesophagitis, Barrett’s, an active ulcer, or are on an NSAID. If trialling, stop within a week if symptoms worsen. This is a conversation, not a recommendation.
• Betaine HCl — same low-acid hypothesis, similar caveats. Specialist or integrative-GP supervision only.
• Stress and vagal tone. The gut-brain axis is real and reflux is part of it. Slow nasal breathing (~6 breaths/minute) before meals, meal mindfulness (sitting down, chewing thoroughly, not eating in front of screens), and broader stress-reduction practices reliably reduce symptom burden even when they don’t change pH-probe measurements. Often the most underrated lever.

Specific to being on a long-term PPI

• B12 adequacy. Annual measurement after 12 months. Replace with oral cyanocobalamin 500–1000 mcg daily if low, or IM 1000 mcg every 3 months if absorption is impaired. Methylcobalamin (sublingual) is an alternative.
• Magnesium. Adequate dietary intake (leafy greens, nuts, seeds, legumes, dark chocolate). Supplement with magnesium glycinate 200–400 mg at night if dietary intake is low or symptoms suggest deficiency.
• Iron. Particularly if menstruating, vegetarian, or elderly. Check ferritin and iron studies if fatigue is unexplained.
• Calcium. Dietary calcium adequacy is the priority. If a supplement is genuinely indicated (post-menopausal osteoporosis context, dairy-free diet, etc.), choose calcium citrate over calcium carbonate — citrate doesn’t depend on stomach acid for absorption.
• Bone-protective lifestyle. Weight-bearing exercise, resistance training, adequate vitamin D — relevant for the modest observational fracture signal but also for general health.

Earning a deprescribe

If your reflux has been driven by reversible factors — weight, evening meals, alcohol, smoking, identifiable trigger foods, untreated stress — addressing those genuinely can make a deprescribe feasible. The work is real, the leverage is real, and the timeline is months, not days.

Two caveats:

• If you have erosive oesophagitis on endoscopy, Barrett’s, ongoing high-bleeding-risk NSAID use, or severe reflux that returns within days every time PPI stops — long-term PPI is appropriate. Lifestyle work still matters but does not replace the medicine.
• Do the deprescribe with your GP, with bridging options ready, knowing the rebound is coming. Solo cold-turkey attempts almost always end in restart at the original dose.

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Red flags — get checked, don’t just raise the dose

If you have any of the signs below, the next step is to get a check (often a scope test). Do not just take more of the pill.

• Food gets stuck when you swallow, or it gets worse over time.
• It hurts when you swallow.
• You lose weight when you did not mean to.
• You see blood when you are sick, or black tar-like poo.
• Low iron in your blood when no clear cause has been found.
• New reflux that starts after age 50 to 55.
• The pills do not work after a full eight week trial at a fair dose.

These need a quick GP visit and may need a gut doctor. See the NICE CG184 guide and the ACG 2022 GORD guide.

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Track these between now and your next visit

• Symptom frequency and severity — how many days per week, daytime versus nocturnal, before or after meals.
• Trigger food correlations — two-week food diary alongside symptom diary.
• Sleep position and bed elevation — if you’re trialling head-of-bed elevation, note before-and-after.
• B12 / iron / magnesium symptoms if you’re 12+ months in — fatigue, paraesthesia, muscle cramps.
• Any new medicines — over-the-counter, supplements, prescriptions from other clinicians.

Bring the list to your review appointment. The conversation about whether you still need the PPI, or whether the dose can step down, is the most important conversation in this whole flyer.

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This is general information, not personal medical advice. Every patient is different. Decisions about your medicines — which one, what dose, when to stop, what to combine with — are made with the doctor who prescribed them. If anything on this page appears to contradict advice from your treating doctor, follow your doctor; they have context about your situation that this page cannot.

Reading this page does not establish a doctor-patient relationship with Dr Hoebing Lo. If you are not a current patient, please discuss your medicines with your own GP, specialist, or pharmacist.

About the integrative content. The lifestyle, dietary, and complementary recommendations on this page summarise current published research. Individual responses will vary, and real-world results are commonly smaller than trial results because day-to-day life differs from study conditions. Supplements and herbal products are not interchangeable with prescribed medication and can interact with it. Talk to your doctor and pharmacist before starting any new supplement, herbal product, or significant change in diet — particularly during a PPI taper.

Currency. This page reflects clinical practice as of the last-reviewed date. Medicine evolves; specific details may date between reviews. Pricing shown is indicative; confirm with your pharmacist.

No commercial relationships. Dr Hoebing Lo has no financial or commercial relationship with the manufacturer of any medicine, brand, or supplement mentioned on this page.

Emergencies. If you have vomiting blood, black tarry stools, severe abdominal pain, sudden swelling of face / lips / tongue, difficulty breathing, chest pain, or fainting, call 000 or go to your nearest emergency department. Do not wait, and do not message us first.