Can Continue Methotrexate and Hydroxychloroquine for Colonoscopy
Yes, you can safely proceed with colonoscopy while the patient continues both methotrexate and hydroxychloroquine without interruption. There is no evidence requiring discontinuation of these medications for endoscopic procedures.
Rationale Based on Available Evidence
Guideline Support for Continuing DMARDs
The 2022 ACR/AAHKS perioperative guideline specifically recommends continuing methotrexate and hydroxychloroquine through surgery for patients with rheumatoid arthritis undergoing major orthopedic procedures (total joint arthroplasty) 1. While this guideline addresses surgical procedures rather than colonoscopy specifically, the principle is highly relevant:
- If these medications can be safely continued through invasive orthopedic surgery with wound healing concerns, they pose minimal risk for a diagnostic/therapeutic endoscopic procedure
- The infection risk from colonoscopy is substantially lower than from joint replacement surgery
- The guideline's conditional recommendation to continue these DMARDs is based on balancing infection risk against disease flare risk
No Evidence of Increased Procedural Risk
Recent data examining colonoscopy with biopsy in patients with prosthetic joints found no increased infection risk even without antibiotic prophylaxis 2. This suggests colonoscopy is a relatively low-risk procedure from an infectious standpoint, making continuation of immunomodulatory therapy even more reasonable.
Drug Safety Considerations
The FDA labels for both medications 3, 4 list various toxicities (hematologic, hepatic, gastrointestinal) but do not require discontinuation for procedures. The main concerns are:
- Methotrexate: Potential for mucositis, GI toxicity, and myelosuppression - but these are chronic toxicity concerns, not acute procedural risks
- Hydroxychloroquine: Very well-tolerated with minimal acute risks relevant to procedures
Disease Control Priority
Stopping these medications risks:
- RA disease flare during the interruption period
- Loss of disease control that may take weeks to regain
- Unnecessary patient morbidity from active arthritis
Practical Approach
Continue both medications without interruption for the colonoscopy. Ensure:
- Recent blood counts are acceptable (no severe cytopenias)
- No active signs of methotrexate toxicity (mucositis, severe GI symptoms)
- Standard colonoscopy preparation and procedural protocols are followed
Important Caveats
The one scenario requiring caution would be if the patient has severe methotrexate-related mucositis or active GI toxicity - in this case, address the toxicity first before proceeding with colonoscopy, as the bowel preparation and procedure could worsen existing GI compromise 3, 5.
Otherwise, there is no medical justification for stopping these medications for a routine colonoscopy.