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			{{Infobox medical condition
			\| name = Achlorhydria
			\| image =[[File:Hydrogen-chloride-3D-vdW-labelled.svg\|250px]]
			\| caption = Structure of [[hydrochloric acid]], the absence of which characterizes achlorhydria
			\| field = [[Gastroenterology]]
			\| synonyms = Gastric anacidity, hypochlorhydria
			\| symptoms = [[Bloating]], [[diarrhea]], [[abdominal pain]], [[nausea]]
			\| complications = [[Malabsorption]], [[bacterial overgrowth]], [[pernicious anemia]]
			\| onset = Can occur at any age
			\| duration = Chronic
			\| causes = [[Autoimmune gastritis]], [[H. pylori infection]], [[proton pump inhibitors]], [[gastric surgery]]
			\| risks = [[Vitamin B12 deficiency]], [[iron deficiency anemia]], [[osteoporosis]]
			\| diagnosis = [[Gastric pH test]], [[endoscopy]], [[serum gastrin levels]]
			\| differential = [[Hypochlorhydria]], [[Zollinger-Ellison syndrome]], [[gastritis]]
			\| treatment = [[Vitamin B12 supplementation]], [[antibiotics]] for infections, [[dietary changes]]
			\| medication = [[Proton pump inhibitors]] (for underlying conditions), [[H2 receptor antagonists]]
			\| frequency = Common in older adults
			\| deaths = Rarely directly fatal
			}}
	'''Achlorhydria''' refers to the absence or markedly reduced levels of hydrochloric acid in the stomach's gastric secretions. Hydrochloric acid plays a pivotal role in the digestion of proteins, absorption of certain nutrients, and defense against potential pathogenic organisms ingested with food. The condition can result from various causes, and its management requires addressing the underlying factors.		'''Achlorhydria''' refers to the absence or markedly reduced levels of hydrochloric acid in the stomach's gastric secretions. Hydrochloric acid plays a pivotal role in the digestion of proteins, absorption of certain nutrients, and defense against potential pathogenic organisms ingested with food. The condition can result from various causes, and its management requires addressing the underlying factors.

Prab at 21:03, 4 September 2023

2023-09-04T21:03:46Z

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'''Achlorhydria''' refers to the absence or markedly reduced levels of hydrochloric acid in the stomach's gastric secretions. Hydrochloric acid plays a pivotal role in the digestion of proteins, absorption of certain nutrients, and defense against potential pathogenic organisms ingested with food. The condition can result from various causes, and its management requires addressing the underlying factors.

=== Etiology ===

[[File:Hydrogen-chloride-3D-vdW-labelled.png|Hydrogen chloride 3D|thumb]]
[[File:Cell parietal.png|Cell parietal|thumb]]
The causes of achlorhydria can be diverse, ranging from chronic diseases to the prolonged use of certain medications:

* '''Chronic Gastritis''': Particularly, autoimmune atrophic gastritis where the body's immune system targets the parietal cells responsible for producing hydrochloric acid.
* '''Prolonged Use of Proton Pump Inhibitors (PPIs)''': These drugs suppress the secretion of stomach acid.
* '''Pernicious Anemia''': An autoimmune disorder affecting the stomach lining and linked to vitamin B12 deficiency.
* '''H. pylori Infection''': This bacterium can damage the stomach lining, resulting in reduced acid production.
* '''Other Causes''': Including surgery involving the removal of the stomach (gastrectomy), aging, or other medical conditions that can affect stomach acid production.

=== Clinical Presentation ===

Patients with achlorhydria might present with a wide array of symptoms, including:

* Digestive disturbances such as bloating, gas, or diarrhea.
* Malabsorption of vitamins and minerals leading to deficiencies.
* Increased susceptibility to gastrointestinal infections.
* Discomfort or pain in the stomach area.
* Unexplained weight loss.
* Reflux-like symptoms, including heartburn.

=== Diagnosis ===

The diagnosis of achlorhydria often involves multiple steps:

* '''Clinical History''': The onset, duration, and character of symptoms can provide clues.
* '''Gastric pH Testing''': Directly measures the pH of the stomach contents.
* '''Serum Gastrin Levels''': Elevated in response to reduced stomach acid.
* '''Endoscopy''': Allows direct visualization of the stomach lining and biopsy if necessary.

=== Treatment and Management ===

Treatment aims to address the underlying cause and alleviate symptoms:

* '''Dietary Modifications''': Consuming smaller meals, reducing spicy or fatty foods, and focusing on easily digestible foods.
* '''Replacement of Acid''': Betaine HCL supplements can be used under medical guidance.
* '''Antibiotics''': For treatment of H. pylori infection.
* '''Discontinuation or Reduction of PPIs''': If they are identified as the causative factor.
* '''Vitamin and Mineral Supplementation''': Especially vitamin B12, calcium, and iron.

=== Prognosis and Complications ===

While many individuals find relief with treatment, untreated achlorhydria can lead to complications:

* Increased risk of gastric cancer due to chronic gastritis and bacterial overgrowth.
* Malnutrition due to malabsorption of nutrients.
* Osteoporosis resulting from decreased calcium absorption.

=== Summary ===

Achlorhydria, while not frequently discussed in popular discourse, is an important medical condition that can impact the quality of life and overall health. Recognizing the signs and seeking timely medical attention is crucial for optimal management.

== See Also ==
* [[Gastritis]]
* [[Pernicious Anemia]]
* [[Hydrochloric Acid]]
* [[Proton Pump Inhibitors]]
{{stub}}
{{Gastroenterology}}
[[Category:Stomach disorders]]
[[Category:Medical Conditions]] [[Category:Gastrointestinal Disorders]] [[Category:Digestive Health]]

Achlorhydria - Revision history

Prab: CSV import

Prab at 21:03, 4 September 2023