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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Black Stool While On Lansoprazole And Bismuth Subsalicylate?

I started a fasting program but had to stop as I developed serious stomach upset, cramps, bloatedness, gas, nausea for 3 weeks now.I have been having dark school for 3 days but no diarrhea. I had been taking these medications- lanzoprazole,bismuth su salicylate, zinc,calcium,magnésium supplément
posted on Tue, 31 Jan 2017
Twitter Sat, 25 Mar 2017 Answered on
Twitter Mon, 27 Mar 2017 Last reviewed on
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Internal Medicine Specialist,  's  Response
Hi..

Thanks for contacting HCM.

You had cramps,bloating for 3 weeks and you had been prescribed drugs for ulcer (lansoprazole and bismuth sub salicylate.

Bismuth sub salicylate can combine with sulphur in saliva and colon forming a dark coloured salt called bismuth sulphide.It colours the tongue and stools black.

Stop bismuth under guidance of a doctor and if the colour of the stool continues to be black ,take up motion complete investigation.

Hope this feed back helps!!!

Take care.
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What Causes Black Stool While On Lansoprazole And Bismuth Subsalicylate?

Hi.. Thanks for contacting HCM. You had cramps,bloating for 3 weeks and you had been prescribed drugs for ulcer (lansoprazole and bismuth sub salicylate. Bismuth sub salicylate can combine with sulphur in saliva and colon forming a dark coloured salt called bismuth sulphide.It colours the tongue and stools black. Stop bismuth under guidance of a doctor and if the colour of the stool continues to be black ,take up motion complete investigation. Hope this feed back helps!!! Take care.