See also How to Use section.

Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.

Some products that may interact with this drug include: mifepristone, oritavancin, telavancin, other drugs that can cause bleeding/bruising (including "blood thinners" such as apixaban/dabigatran).

This medication is sometimes used together with other drugs that have "blood thinning" or anti-platelet effects such as aspirin, clopidogrel, or warfarin. If your doctor prescribes a combination of these drugs, your doctor will monitor you closely to minimize your risk of bleeding. Keep all medical and lab appointments.

Check all prescription and nonprescription medicine labels carefully since many medications contain pain relievers/fever reducers (NSAIDs such as ibuprofen, naproxen, or aspirin) that can increase the risk of bleeding when used with heparin. However, if your doctor has told you to take low-dose aspirin to prevent heart attack or stroke (usually 81-162 milligrams a day), you should keep taking the aspirin unless your doctor tells you not to. Ask your doctor or pharmacist for more details.

Cigarette smoking decreases blood levels of this medication. Tell your doctor if you smoke or if you have recently stopped smoking.

This medication may interfere with certain lab tests (such as certain liver function tests, prothrombin time), possibly causing false test results. Make sure lab personnel and all your doctors know you use this drug.