Precautions

Your doctor will check your progress closely while you or your child are receiving this medicine. This will allow your doctor to see if the medicine is working properly and to decide if you should continue to receive it. Blood tests may be needed to check for unwanted effects.

Using this medicine while you are pregnant can harm your unborn baby. Use an effective form of birth control to keep from getting pregnant. If you think you have become pregnant while using this medicine, tell your doctor right away.

Do not use this medicine together with riociguat (Adempas®), sildenafil (Viagra®), tadalafil (Cialis®), or vardenafil (Levitra®). Using these medicines together may cause unwanted effects.

This medicine could lower your blood pressure too much and cause you to feel dizzy or lightheaded. Stand or sit up slowly if you are dizzy.

Tell your doctor right away if you or your child have bluish-colored lips, fingernails, or palms, dark urine, trouble breathing, unusual bleeding, bruising, or weakness while using this medicine.