Poisoning by antacids and antigastric secretion drugs

This code signifies an adverse reaction or toxic effect resulting from the ingestion or exposure to medications intended to neutralize stomach acid or reduce gastric acid secretion. This includes substances like aluminum hydroxide, magnesium hydroxide, calcium carbonate, and H2 blockers or proton pump inhibitors when taken in excessive doses or causing an unintended harmful effect.

Apply this code when documentation clearly indicates a patient presents with symptoms of poisoning due to antacids or drugs that suppress gastric acid. This typically involves cases of overdose, accidental ingestion, or adverse effects from therapeutic use that reach a toxic level. Supporting documentation should specify the substance involved and the resulting toxic manifestation.

• Always sequence this code first if it represents the primary reason for the encounter (e.g., acute poisoning).
• Utilize an E-code (e.g., E850.x for accidental poisoning, E950.x for suicide attempt) to identify the external cause of the poisoning.
• Ensure documentation differentiates between an adverse effect (proper dosage, unexpected reaction) and poisoning (overdose or toxic reaction).