Medications
Learning Center
Antibiotics and alcohol
Alcohol doesn't make antibiotics less effective. But it's still a good idea not to drink alcohol while taking antibiotics.
Antibiotics: Are you misusing them?
The overuse of antibiotics creates antibiotic-resistant germs. Protect yourself and others by using antibiotics wisely.
Aortic valve disease
Learn more about diseases that affect the valve between the heart's main pumping chamber and the body's main artery.
Aortic valve repair and aortic valve replacement
These types of heart valve surgeries are done to treat aortic valve disease, including aortic stenosis and aortic regurgitation.
Aortic valve stenosis
Learn more about the symptoms and treatment of this condition that reduces or blocks blood flow from the heart to the body.
Arteriovenous malformation
In this condition, a tangle of blood vessels affects the flow of blood and oxygen. Treatment can help.
Ascariasis
Learn more about the causes, treatment and prevention of this roundworm infection.
Astigmatism
Imperfect curvature of your eye can cause blurred distance and near vision. Learn about this common and treatable eye condition.
Ataxia
Often caused by an underlying condition, this loss of muscle control and coordination can impact movement, speech and swallowing.
Atrial septal defect (ASD)
This heart problem that is present at birth causes a hole between the heart's upper chambers. It can be treated.
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