Partial Thromboplastin Time

Activated Partial Thromboplastin Time, APTT (Activated Parital Thromboplastin Time), PTT (Partial Thromboplastin Time)

What Affects the Test

Reasons you may not be able to have the test or why the results may not be helpful include:

• Taking some herbal products or natural remedies.
• Taking some medicines, such as antihistamines or aspirin.

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Author:	Jan Nissl, RN, BS	Last Updated: September 25, 2006
Medical Review:	Patrice Burgess, MD - Family Medicine Joseph O'Donnell, MD - Hematology/Oncology
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