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Precautions
It is very important that your doctor check your progress at regular visits to make sure that this medicine is working properly. Blood tests may be needed to check for unwanted effects.
This medicine may cause serious types of allergic reactions, including anaphylaxis. Anaphylaxis can be life-threatening and requires immediate medical attention. Call your doctor right away if you have a rash; itching; hoarseness; lightheadedness, dizziness, or fainting; trouble with breathing; trouble with swallowing; or any swelling of your hands, face, or mouth after you receive this medicine.
Dizziness, lightheadedness, or fainting may occur, especially when you get up from a lying or sitting position suddenly. These symptoms are more likely to occur when you begin using this medicine, or when the dose is increased.
Before you have any medical tests, tell the medical doctor in charge that you are using this medicine. The results of some tests (e.g., magnetic resonance imaging or MRI) may be affected by this medicine.
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