Does Sucralfate change stool colour? 

Does Sucralfate change stool colour? 

Sucralfate does not necessarily change the colour of your stool, but it could make your stool appear a little paler than usual. This is probably because Sucralfate contains aluminium, which can make your poop a shade or two lighter. 

This could also be due to the fact that Sucralfate is removed via stool mostly in an unchanged form as the drug doesn’t really get dissolved. 

It rather coats the lining of your gastrointestinal tract to help protect it from acid attacks (1,2). So, that coating can also show up as cream or pale-coloured coating around your stool. 

Should you be concerned about lighter stool on Sucralfate? 

As I explained in the previous section, Sucralfate doesn’t change the colour of your stool as a side effect and the lightened stool colour is not observed in every case. Even if it does, it’s absolutely harmless. 

However, if your stool appears darker than usual or has a red hue in it, you should immediately reach out to your healthcare provider. Dark-coloured stool could be a sign of gastrointestinal bleeding in patients with ulcers and it should be thoroughly checked. 

Potential causes of light-coloured stools

Some potential causes of light-coloured stools which are unrelated to the use of Sucralfate include (3,4):

  • Obstruction in the bile ducts can prevent the flow of bile into the intestines, leading to light-coloured stools.
  • Liver diseases such as liver cirrhosis, hepatitis, or liver cancer can affect the production or secretion of bile, resulting in pale stools.
  • Gallbladder problems, such as gallstones or inflammation, can interfere with normal bile release, leading to light-coloured stools.
  • Conditions like pancreatitis or pancreatic cancer can affect the production of digestive enzymes, including those that help break down fats, leading to pale stools.
  • Certain medications, such as antacids containing aluminium hydroxide, can cause light-coloured stools as a side effect.
  • Conditions that interfere with the absorption of fats, such as celiac disease or cystic fibrosis, can result in pale stools.
  • Some infections, like viral hepatitis, can affect liver and bile production, resulting in light-coloured stools.
  • In some cases, the stools may appear lighter if they pass through the digestive tract too quickly, not giving enough time for the bile to be fully metabolized.
  • Consuming foods low in bile pigments, such as a low-fat diet or certain nutritional supplements, can also contribute to lighter stools.

It’s important to note that if you have persistent or unexplained changes in stool colour, it’s recommended to consult with a healthcare professional for a proper evaluation and diagnosis.

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References

1.-

Kudaravalli P, John S. Sucralfate. 2022 Feb 25. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2023 Jan–. PMID: 31855371. https://www.ncbi.nlm.nih.gov/books/NBK551527

2.-

Brogden RN, Heel RC, Speight TM, Avery GS. Sucralfate. A review of its pharmacodynamic properties and therapeutic use in peptic ulcer disease. Drugs. 1984 Mar;27(3):194-209. doi: 10.2165/00003495-198427030-00002. PMID: 6368184. https://pubmed.ncbi.nlm.nih.gov/6368184/

3.-

Walker TJ. On the Clinical Significance of Colourless or Clay-coloured Stools unaccompanied by Jaundice, and their connection with Disease of the Pancreas; and on the part played by the Pancreas in Eliminating Bile from the Intestines. Med Chir Trans. 1889;72:257-73. doi: 10.1177/095952878907200115. PMID: 20896747; PMCID: PMC2121540. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2121540/

4.-

Guo J, He R, Mao ZQ. Case Report: White Colored Stool: An Early Sign of Cystic Fibrosis in Infants. Front Pediatr. 2021 Apr 14;9:656584. doi: 10.3389/fped.2021.656584. PMID: 33937153; PMCID: PMC8081048. https://pubmed.ncbi.nlm.nih.gov/33937153/