noun
a type of medication that inhibits the action of histamine on the H2 receptors in the stomach, reducing the production of stomach acid
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The patient was prescribed an H2 blocker to help manage their acid reflux.
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I take an H2 blocker before bed to prevent heartburn.
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I need to grab some H2 blockers from the pharmacy for my stomach issues.
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Using an H2 blocker is like putting a shield over your stomach to protect it from excess acid.