Methyldopa and Colestipol Interaction
Drug interaction information between Methyldopa and Colestipol.
Methyldopa and Colestipol have a documented minor interaction in FDA labeling.
FDA drug labeling documents a minor-severity interaction between Methyldopa and Colestipol. Major interactions are generally avoided, moderate ones may need monitoring or a dose adjustment, and minor ones are usually low-risk. This page shows the documented mechanism and guidance. Label-documented interactions are not a complete safety review, so always confirm your own medications with a pharmacist or doctor. Educational information, not medical advice.
How They Interact
This drug does not seem to change how much methyldopa gets into your blood when they are taken together.
What To Do
No special changes are usually needed, but you should still monitor your health as directed by your doctor.
FDA Label Information
No depressant effect on blood levels in humans was noted when colestipol hydrochloride was administered with any of the following drugs: aspirin, clindamycin, clofibrate, methyldopa, nicotinic acid (niacin), tolbutamide, phenytoin or warfarin.
Methyldopa Also Interacts With
- Ferrous Sulfate moderate
- Carbidopa/Levodopa moderate
- Tranylcypromine moderate
- Lithium minor
- Enalapril minor
Colestipol Also Interacts With
- Olmesartan moderate
- Furosemide minor
- Aspirin minor
- Propranolol minor
- Warfarin minor
Frequently Asked Questions
Can I take Methyldopa and Colestipol together?
This is a minor interaction. No special changes are usually needed, but you should still monitor your health as directed by your doctor.
How serious is the interaction between Methyldopa and Colestipol?
This interaction is classified as "minor" severity by the FDA. Minor interactions are unlikely to cause significant problems but should still be mentioned to your healthcare provider.
Why do Methyldopa and Colestipol interact?
This drug does not seem to change how much methyldopa gets into your blood when they are taken together.
Understanding the Methyldopa and Colestipol Interaction
FDA-approved prescribing information for these two drugs flags their combination as a minor-severity interaction. Methyldopa belongs to the Central Alpha-2 Agonist class and Colestipol belongs to the Bile Acid Sequestrant class - two categories that can collide when co-prescribed. The mechanism described in FDA labeling is: This drug does not seem to change how much methyldopa gets into your blood when they are taken together. Severity tiers matter: major flags generally advise avoidance, moderate flags often require monitoring or dose adjustment, and minor flags may only call for awareness.
Context around a specific patient determines real-world impact. Methyldopa has 7 total documented interactions on file in this dataset, and Colestipol has 24. Each additional medication compounds the interaction surface, which is why pharmacists run full-profile checks rather than evaluating one pair at a time. FDA-derived guidance for this pair is: No special changes are usually needed, but you should still monitor your health as directed by your doctor. Timing of doses, renal and hepatic function, age, and other concurrent prescriptions all shape whether a labeled interaction matters clinically.
An interaction flag is not a verdict. A large share of labeled interactions are managed routinely in clinical practice, the fix may be as simple as spacing doses or adding a monitoring test. Others require the prescriber to choose a different medication entirely. This page surfaces FDA-sourced labeling and openFDA data for educational purposes only; it is not medical advice and cannot account for your full clinical picture. Never start, stop, or adjust either Methyldopa or Colestipol based on a web page, speak with your prescriber or pharmacist before making any change.
Sources: FDA Drug Labels (SPL) via openFDA (2026). This is for informational purposes only and is not medical advice. Always consult your healthcare provider about drug interactions.
Read our methodology - how this data is sourced, computed, and verified.