Why Antacids Are Not the Solution - A Gastroenterologist’s Honest Take

The antacid has become as routine as the morning cup of tea for a significant portion of the adult population in India. It sits on the kitchen counter, in the office drawer, in the car’s glove compartment. After a heavy meal, after a stressful day, after waking at 3am with a burning throat – the antacid is reached for as automatically as a painkiller for a headache. It works quickly, it’s available without prescription, and it costs very little. What’s the problem?

The problem is not the antacid itself. Used occasionally, for the occasional bout of acidity from a meal that went too large or too late, antacids are fine. The problem is what the daily antacid habit represents and what it conceals. An antacid taken every day is not a treatment. It is a suppressant – and whatever it is suppressing continues underneath, untouched and often progressing.

A gastroenterologist’s honest assessment of India’s antacid relationship is that millions of people are managing their acidity with varying levels of relief while simultaneously allowing the conditions that cause it to continue unchecked. Some of those conditions are straightforward. Some are not. And the antacid, by making the symptom bearable, systematically delays the conversation that would identify which situation the person is actually in.

What Antacids Actually Do – and What They Don’t

Antacids work by neutralising stomach acid. The most common active ingredients – calcium carbonate, magnesium hydroxide, aluminium hydroxide, and sodium bicarbonate – are alkaline compounds that react with stomach acid to raise the pH of the gastric contents temporarily. The burning sensation eases because the acid causing it has been chemically neutralised.

This is effective and it is fast. For occasional, situational acidity, it is entirely appropriate. The mechanism is well understood and the short-term safety profile is good.

What antacids do not do:

• They do not reduce acid production – they neutralise acid that has already been produced. Within hours, acid production resumes at its normal rate and the pH of the stomach returns to its usual level
• They do not address the cause of excessive acid production or acid reflux – whether that cause is H. pylori infection, a hiatal hernia, a peptic ulcer, GERD, or a diet and lifestyle pattern driving the problem
• They do not protect the oesophageal lining from acid damage that has already occurred or is occurring between doses
• They do not reduce the risk of the long-term complications of untreated GERD – Barrett’s oesophagus and the small but real increased risk of oesophageal cancer that follows from it
  
  

The antacid relieves the symptom. It does not address what is causing the symptom. In medicine, this distinction matters enormously when the underlying cause is something that progresses over time.

The Rebound Acid Problem – Why the Antacid Stops Working

One of the most clinically relevant – and least discussed – consequences of regular antacid use is acid rebound. Calcium carbonate antacids in particular – the white chewable tablets that are the most commonly consumed type in India – stimulate gastrin release as they neutralise acid. Gastrin is the hormone that signals the stomach to produce more acid. The result is that as the neutralising effect of the antacid wears off, the stomach produces acid at a higher rate than it would have without the antacid.

This rebound hypersecretion creates a cycle: the antacid relieves symptoms, the relief fades, acid returns at a higher level than baseline, the discomfort worsens, and another antacid is taken. Over time, the person finds they need more doses, more frequently, to achieve the same relief. This is antacid dependency – not a pharmacological addiction in the classical sense, but a physiological dependence where the gut’s acid-producing mechanism has been altered by the habitual use of neutralising agents.

People in this cycle often say their acidity has ‘gotten worse over the years’. In some cases it genuinely has, because an underlying condition has progressed. In others, the pattern of worsening is at least partly driven by the very antacid use that has been managing the symptoms – a self-perpetuating loop that is rarely identified because nobody has asked what the person has been taking and for how long.

The Long-Term Side Effects of Daily Antacid Use

Antacids are widely perceived as harmless because they are available without prescription and are taken in relatively small doses. This perception does not hold up for daily use over months and years. Each antacid type has its own profile of long-term effects when used chronically:

Calcium Carbonate (e.g. Gelusil, ENO calcium types)

Daily use of calcium-containing antacids at high doses over extended periods can cause milk-alkali syndrome – a condition of hypercalcaemia (elevated blood calcium), metabolic alkalosis, and kidney damage. It was historically associated with high milk intake, but calcium carbonate antacids are now a significant cause. Kidney stone formation is a related risk with chronic high calcium intake. Constipation is a consistent short-term side effect of calcium-containing antacids that becomes progressively troublesome with daily use.

Aluminium Hydroxide

Aluminium-containing antacids cause constipation and, with very long-term use, can impair phosphate absorption from the gut – leading to phosphate depletion and associated bone and muscle problems. Aluminium accumulation has been studied in the context of neurological concerns, though the evidence at antacid doses is not definitive. In patients with kidney disease, aluminium accumulation is a genuine risk and aluminium-containing antacids are specifically avoided in this group.

Magnesium Hydroxide

The primary side effect of magnesium-containing antacids is diarrhoea, which is why many antacid formulations combine calcium and magnesium to balance the constipating and laxative effects. In patients with impaired kidney function, magnesium accumulation from chronic antacid use is a risk because the kidneys are responsible for excreting excess magnesium. Hypermagnesaemia can cause muscle weakness, low blood pressure, and in severe cases, cardiac arrhythmias.

Sodium Bicarbonate (ENO fruit salt, baking soda preparations)

Sodium bicarbonate works rapidly and effectively but delivers a meaningful sodium load with each dose. For people with hypertension, heart failure, or kidney disease – conditions that require sodium restriction – daily sodium bicarbonate antacid use is specifically problematic. Sodium bicarbonate also produces carbon dioxide gas as a byproduct of neutralisation, which causes belching and can worsen bloating. Regular use can cause metabolic alkalosis, which has its own set of physiological consequences.

PPIs – The Stronger Suppressant That Has Its Own Long-Term Story

Proton pump inhibitors – omeprazole, pantoprazole, rabeprazole, esomeprazole – are a step up from antacids in terms of acid suppression. They block the proton pumps in the stomach lining that produce acid, reducing gastric acid output dramatically and for a sustained period. They are far more effective than antacids for GERD, peptic ulcers, and conditions requiring consistent acid suppression.

PPIs are a legitimate, evidence-based treatment when used appropriately and for the right indications. The issue is that they are also among the most overprescribed medications globally – and India is no exception. A significant proportion of people taking a daily PPI do not have an indication that requires one, have never had a formal gastroenterological assessment, and have been on the medication for years without review.

The long-term side effects of PPI use that are now well-established in the literature:

• Magnesium deficiency – PPIs reduce magnesium absorption from the gut. Chronic hypomagnesaemia causes muscle cramps, fatigue, cardiac arrhythmias, and impairs calcium and potassium metabolism
• Vitamin B12 deficiency – stomach acid is required to cleave B12 from dietary protein for absorption. Long-term acid suppression impairs B12 absorption, and deficiency develops gradually over years, affecting neurological function and red blood cell production
• Calcium and bone health – acid is required for calcium absorption from the gut. Long-term PPI use is associated with reduced bone mineral density and modestly increased fracture risk, particularly hip fracture in older patients
• Gut microbiome disruption – the acidic environment of the stomach is one of the body’s defences against ingested pathogens. Reducing stomach acidity allows more bacteria to survive passage through the stomach and alters the composition of the gut microbiome. Long-term PPI use is associated with higher rates of Clostridium difficile infection and small intestinal bacterial overgrowth (SIBO)
• Rebound acid hypersecretion on discontinuation – similar to antacid rebound but more pronounced. Abrupt discontinuation of long-term PPI use causes a surge in acid production that can produce symptoms worse than the original condition. This is why people who try to stop their PPI often conclude they cannot live without it, when what they are actually experiencing is a withdrawal effect rather than their underlying condition
• Potential association with kidney disease – multiple large observational studies have found associations between long-term PPI use and chronic kidney disease, though the causality question is not fully resolved
  
  

What the Antacid Is Covering Up – The Conditions That Need Actual Treatment

The most significant clinical cost of long-term antacid use is not the direct side effects. It is what the antacid suppresses while the underlying condition continues:

pylori Infection

Helicobacter pylori is a bacterial infection of the stomach lining that is one of the most common human infections globally, with particularly high prevalence in India. It causes gastritis, peptic ulcers, and is a risk factor for gastric cancer. Antacids reduce the symptoms of H. pylori-related gastritis without addressing the infection. The bacteria continue colonising the stomach, continuing their inflammatory and carcinogenic effect, while the person takes antacids and concludes they are managing their condition. H. pylori is diagnosed with a breath test, stool antigen test, or biopsy during endoscopy – and eradicated with a defined course of antibiotics. After eradication, the need for acid suppression in most cases disappears entirely.

Peptic Ulcers

An active peptic ulcer – a break in the lining of the stomach or duodenum – requires proper treatment, not symptom management. Antacids provide temporary relief but do not promote ulcer healing. A peptic ulcer that bleeds or perforates is a life-threatening emergency. The risk of these complications in an untreated ulcer is real and measurable. Many people who are managing what they describe as ‘bad acidity’ with daily antacids are managing an ulcer that needs endoscopic assessment and proper treatment.

GERD with Oesophageal Damage

Gastro-oesophageal reflux disease causes progressive damage to the oesophageal lining with each reflux episode. Antacids neutralise the acid in the refluxate temporarily but do not prevent reflux episodes or heal the oesophageal damage that has accumulated. Over years, inadequately treated GERD can produce oesophageal stricturing (narrowing that causes swallowing difficulty), Barrett’s oesophagus (precancerous mucosal change), and a small but real risk of oesophageal adenocarcinoma. The antacid takes the edge off the heartburn but does not interrupt this progression.

Hiatal Hernia

A hiatal hernia – where part of the stomach herniates through the diaphragm into the chest – weakens the lower oesophageal sphincter and makes reflux structurally inevitable in many patients. Antacids treat the acid but cannot change the anatomy. Understanding whether a hiatal hernia is present changes the management approach, the medication choices, and the threshold for considering anti-reflux surgery in patients with severe or refractory GERD. This can only be identified with an endoscopy.

What a Gastroenterologist Would Actually Do

A gastroenterologist seeing a patient who has been taking daily antacids for a year or more is not going to prescribe a better antacid. The clinical process starts from the beginning:

• A detailed symptom history – the character of the discomfort, its timing, its triggers, what makes it better and worse, associated symptoms including difficulty swallowing, unintentional weight loss, or black stools
• Review of current medications for those that impair lower oesophageal sphincter function or increase acid production – NSAIDs, calcium channel blockers, nitrates, and others
• pylori testing – a non-invasive breath test or stool antigen test as a starting point
• Upper GI endoscopy where indicated – to directly visualise the oesophagus, stomach, and duodenum, assess for GERD-related damage, identify ulcers, take biopsies, and rule out more serious pathology
• Dietary and lifestyle assessment – meal timing, portion sizes, alcohol and caffeine intake, late eating, weight, clothing habits, sleep position
  
  

Based on findings, the treatment approach is specific rather than generic: H. pylori eradication if present, appropriate PPI therapy at the right dose and duration for peptic ulcer or GERD, lifestyle modification targeting the specific contributors identified, and a defined review timeline rather than indefinite continuation of a medication that may not be addressing the actual problem.

The goal is not to suppress acid indefinitely. It is to identify and treat what is causing the acid problem, and to get the patient off long-term acid suppression wherever that is safely achievable.

Signs That It’s Time to Stop Self-Managing and See a Gastroenterologist

If any of these apply, the antacid is no longer adequate as a management strategy:

• Acidity symptoms occurring four or more times per week despite taking antacids
• Daily antacid use for more than two weeks without improvement
• Symptoms that are worsening despite increasing antacid frequency or dose
• Difficulty swallowing, or a sense of food sticking in the throat or chest
• Unintentional weight loss alongside digestive symptoms
• Vomiting blood or material that looks like coffee grounds
• Black, tarry stools
• Symptoms that wake you from sleep
• Using antacids for more than three months continuously
• Symptoms that started after age 50 with no previous history of acidity
  
  

The last point deserves emphasis. New-onset significant upper GI symptoms in someone over 50 warrant endoscopy to exclude malignancy rather than a trial of antacids. This is a red flag that a gastroenterologist will act on immediately.

Gastroenterology Consultations at Sayee Specialty Hospital, Padappai

Sayee Specialty Hospital’s Gastroenterology department provides comprehensive evaluations for acid-related disorders, GERD, peptic ulcer disease, H. pylori infection, and all upper GI concerns – with in-house endoscopy facilities for complete diagnostic assessment on the same visit. If you’ve been reaching for the antacid tin for months and your symptoms are still there, the tin is not the answer. The answer is finding out what’s actually going on.

Acidity that doesn’t go away has a reason. Finding that reason – and treating it rather than suppressing it – is what actually changes the pattern.

Book a gastroenterology consultation at Sayee Specialty Hospital, or call us at 9 976 976 976. Available across the week, serving Padappai, Vandalur, Chromepet, and South Chennai.