Does mesalamine (5-aminosalicylic acid) need to be stopped prior to colonoscopy?

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Last updated: June 11, 2025View editorial policy

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From the Research

Mesalamine (5-aminosalicylic acid) typically does not need to be stopped prior to colonoscopy. Patients can continue taking their regular mesalamine medications, including oral forms (tablets, capsules) and rectal forms (suppositories, enemas), right up to the day of the procedure. However, on the day of colonoscopy, patients should follow their healthcare provider's specific instructions regarding morning medications. The rationale for continuing mesalamine is that it does not interfere with the bowel preparation process or affect the visualization of the colon during the procedure, as supported by studies such as 1. Additionally, maintaining mesalamine therapy helps prevent disease flares in patients with inflammatory bowel disease.

Some key points to consider:

  • Mesalamine is a first-line therapy for ulcerative colitis, and its continuation is crucial for maintaining remission, as noted in 1.
  • The bowel preparation solution itself is the primary factor in achieving a clean colon for optimal visualization during colonoscopy, not the temporary discontinuation of mesalamine.
  • Patients should inform their gastroenterologist about all medications they are taking, as individual circumstances may occasionally warrant different recommendations.
  • It's essential to follow the healthcare provider's instructions regarding morning medications on the day of the colonoscopy to ensure the best possible outcome.

The most recent and highest quality study, 1, published in 2020, confirms the efficacy and safety of mesalamine in patients with mild to moderate ulcerative colitis, further supporting the decision to continue mesalamine therapy before a colonoscopy.

References

Research

Mesalamine in the Initial Therapy of Ulcerative Colitis.

Gastroenterology clinics of North America, 2020

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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