Use exactly as directed on the label, or as prescribed by your doctor.
Shake the oral suspension (liquid) before you measure a dose. Use the dosing syringe provided, or use a medicine dose-measuring device (not a kitchen spoon).
You must chew the chewable tablet before you swallow it.
Drink plenty of liquids while you are taking bismuth subsalicylate.
Do not take more than 8 doses in one day (24 hours).
Call your doctor if you still have diarrhea after 2 days of using  bismuth subsalicylate.
This medicine can affect the results of certain medical tests. Tell any doctor who treats you that you are using bismuth subsalicylate.
Store at room temperature away from moisture and heat. Do not freeze.
 Detailed Bismuth subsalicylate dosage information
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What happens if I miss a dose?
Since bismuth subsalicylate is used when needed, you may not be on a dosing schedule. Skip any missed dose if it's almost time for your next dose. Do not use two doses at one time.
Do not take more than 8 doses per day.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
Overdose symptoms may include weakness, depression, anxiety, feeling irritable, problems with balance or coordination, confusion, tremors, or jerky muscle movements.
