It is very important that your doctor check your or your child's progress at regular visits to make sure that the medicine is working properly. Blood tests may be needed to check for unwanted effects. Be sure to keep all appointments.

This medicine may increase your risk of bleeding or bruising. This risk is higher if you have poorly controlled high blood pressure, a heart infection, stomach ulcers, or other bleeding problems. Check with your doctor right away if you notice any unusual bleeding or bruising, black, tarry stools, blood in the urine or stools, or pinpoint red spots on your skin. Avoid picking your nose. If you need to blow your nose, blow it gently.

This medicine may increase your risk of serious bleeding or nerve problems in your spine. This risk is higher if you have a catheter in your back for pain medicine or anesthetics, or have an injection into your spine (sometimes called an "epidural" or "spinal"). Other factors include traumatic or repeated epidural or spinal punctures in the past, spinal deformity, previous spinal surgery, or use of other medications that increase the risk of bleeding. Check with your doctor right away if you develop weakness or numbness in your legs or feet, or loss of urine or bowel control.

Call your doctor right away if you start having pains in the chest, groin, or legs, especially the calves, difficulty with breathing, severe, sudden headache, slurred speech, sudden, sudden loss of coordination, sudden, severe weakness or numbness in the arm or leg, or vision changes. These may be symptoms of thromboembolism.

Be careful when using a regular toothbrush, dental floss, or toothpick. Your medical doctor, dentist, or nurse may recommend other ways to clean your teeth and gums. Check with your medical doctor before having any dental work done.

Be careful not to cut yourself when you are using sharp objects, such as a safety razor or fingernail or toenail cutters. Avoid contact sports or other situations where bruising or injury could occur.

This medicine contains benzyl alcohol which may cause serious unwanted effects to newborn or premature infants. Talk to your doctor if you have concerns about this.

Make sure any doctor or dentist who treats you knows that you are using this medicine. You may need to stop using this medicine several days before having surgery or medical tests.

Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.