Klabex Clarithromycin Fesoterodine Fumarate
MajorClarithromycin strongly slows how the body clears fesoterodine, so fesoterodine can build up. If you take clarithromycin, the fesoterodine dose should not be more than 4 mg.
These medicines can affect each other in a serious way. Do not start taking them together unless your doctor has said it is OK. If you already take both, do not stop either one on your own: speak to your doctor or pharmacist soon.
What to do: Do not take them together unless your doctor has said so. If your doctor prescribed both, follow their instructions.