MedlinePlus is an online health information resource for patients, their families, and friends. It is a service of the National Library of Medicine (NLM), the world's largest medical library, and a part of the National Institutes of Health (NIH). MedlinePlus presents high-quality, relevant health and wellness information that is trusted and easy to understand in English and Spanish. MedlinePlus makes reliable health information available anytime, anywhere, for free.
