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Related Concept Videos

Allergic Reactions02:06

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Histamine H2 receptors, which are intricately located on the basolateral membrane of parietal cells, play a crucial role in modulating gastric acid secretion. When released from enterochromaffin-like cells, histamine engages H2 receptors, initiating the cyclic AMP (cAMP) pathway. In this pathway, adenylyl cyclase converts ATP into cAMP, elevating intracellular cAMP levels. The activation of protein kinase A follows, stimulating the proton pump. This stimulation prompts the secretion of hydrogen...
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Gastroesophageal reflux disease, or GERD, is a persistent medical condition that affects many individuals worldwide. Its clinical manifestations can vary greatly, making diagnosis and management challenging for healthcare professionals. The following is a comprehensive overview of the clinical manifestations, assessment, and management strategies for GERD.
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The clinical manifestations of gastritis can vary depending on the cause and type of gastritis, but some common symptoms may include the following.
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Related Experiment Video

Updated: Jan 10, 2026

Recognition of Epidermal Transglutaminase by IgA and Tissue Transglutaminase 2 Antibodies in a Rare Case of Rhesus Dermatitis
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Famotidine-Induced Rash and Eosinophilia: A Case Report.

Abeera Junaid1, Johann Graggaber2

  • 1General and Acute Internal Medicine, Cambridge University Hospitals NHS Foundation Trust, Cambridge, GBR.

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|November 25, 2025
PubMed
Summary
This summary is machine-generated.

A hypersensitivity reaction to famotidine, a common acid reducer, occurred in an elderly patient with influenza A and a urinary tract infection. The rash resolved after famotidine was stopped, confirming it as the likely cause.

Area of Science:

  • Clinical Medicine
  • Pharmacology
  • Dermatology

Background:

  • Elderly patients may present with multiple comorbidities requiring diverse pharmacological interventions.
Keywords:
allergycutaneous-drug eruptiondrug-induced eosinophiliafamotidinemaculopapular rash

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  • Drug-induced hypersensitivity reactions can manifest with varied dermatological symptoms.
  • Proton pump inhibitors (PPIs) are frequently used, but alternative H2 blockers like famotidine are also common.