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H2 Blockers

What If I Take an Overdose?

People who take too much of an H2 blocker may have overdose symptoms that could include, but are not limited to:
 
  • Watery eyes
  • Increased salivation
  • Constricted pupils
  • Diarrhea
  • Changes in walking patterns
  • Muscle tremors or shakiness
  • Vomiting
  • Restlessness
  • Low blood pressure (hypotension)
  • Trouble breathing
  • A rapid heart rate (tachycardia)
  • Coma
  • Loss of life.
     
If you happen to overdose on an H2 blocker, seek medical attention immediately.
 

Examples of H2 Blockers

There are four prescription H2 blockers currently available:
 
Some over-the-counter H2 blockers include:
 
  • Cimetidine (Tagamet HB®)
  • Famotidine (Pepcid AC®, Pepcid® Complete)
  • Ranitidine (Zantac Acid Reducer®).
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Written by/reviewed by: Kristi Monson, PharmD; Arthur Schoenstadt, MD
Last reviewed by: Kristi Monson, PharmD;
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