Does Colesevelam Hydrochloride Interact with Glimepiride?
Colesevelam Hydrochloride and Glimepiride have a major drug interaction according to U.S. FDA drug labeling data. Colesevelam may decrease sulfonylurea exposure. Administer glimepiride 4 hours prior to colesevelam. The mechanism involves bile acid sequestrant binding reducing drug absorption. Patients taking both medications should consult their healthcare provider before starting, stopping, or changing the dosage of either drug. This information is based on official FDA drug labeling sourced from OpenFDA and the NIH National Library of Medicine.
- Severity
- Major
- Glimepiride Class
- Sulfonylurea
- Management
- Close medical supervision required
- Data Source
- U.S. FDA via OpenFDA
How This Interaction Works
The interaction between Colesevelam Hydrochloride and Glimepiride occurs because bile acid sequestrant binding reducing drug absorption. Clinically, this means colesevelam may decrease sulfonylurea exposure. administer glimepiride 4 hours prior to colesevelam. This is classified as a major interaction, meaning it could cause serious harm if not properly managed. Your healthcare provider may need to adjust dosages, substitute one medication, or increase monitoring frequency.
What To Tell Your Doctor or Pharmacist
If you are taking Colesevelam Hydrochloride and your doctor is considering prescribing Glimepiride (or vice versa), make sure to:
- Inform your doctor and pharmacist of all current medications, including over-the-counter drugs and supplements
- Ask whether the benefits of combining these medications outweigh the risks for your specific situation
- Ask what symptoms to watch for that would indicate the interaction is causing problems
- Ask how frequently you should be monitored while these are co-prescribed
- Ask whether any dosage adjustments are needed
- Never stop or change either medication without first consulting your healthcare provider