If you take colesevelam, take your olmesartan dose 4 hours before you take colesevelam.
Tell your doctor about all your other medicines, especially:
lithium;
a diuretic (water pill) or other medicines that lower blood pressure; or
NSAIDs (nonsteroidal anti-inflammatory drugs)--aspirin, ibuprofen (Advil, Motrin), naproxen (Aleve), celecoxib, diclofenac, indomethacin, meloxicam, and others.
This list is not complete. Other drugs may affect olmesartan, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are listed here.
 Olmesartan drug interactions (more detail)
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