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Disease

Drug addiction (substance use disorder)

Drug addiction affects your brain and behavior to the point where you can't control your use of legal or illegal drugs, even when you know they cause harm.
Disease

Drug allergy

Learn which medicines are more likely to cause an allergic reaction, what symptoms look like and what treatments can calm such a reaction.
Disease

Dural arteriovenous fistulas

Learn about these rare, irregular connections that can occur between arteries and veins in the protective covering of the brain and spinal cord.
Disease

Dust mite allergy

This allergy can lead to year-round sniffles and sneezes. Here's how to find relief.
Disease

Ebstein anomaly

In this rare heart defect, the tricuspid heart valve didn't form properly. This can affect the heart's ability to pump blood. Know the risks and symptoms.
Disease

Egg allergy

This allergy can cause a serious reaction in children and adults. Learn the symptoms and what to do in case of a serious reaction.
Disease

Ehrlichiosis and anaplasmosis

Learn how to prevent and treat the tick-borne diseases ehrlichiosis and anaplasmosis.
Disease

Exercise-induced asthma

Regular exercise is good for you in many ways, but for some people, exercise can trigger breathing problems. Medicine can help.
Disease

Familial adenomatous polyposis

This inherited condition leads to colon cancer. Treatment consists of having frequent screenings and having surgery to remove all or part of the colon.
Disease

Fetal alcohol syndrome

This condition results from alcohol exposure before birth. The exposure causes lifelong problems with behavior, learning, thinking and physical development.
Disease

Food allergy

For people with food allergies, symptoms can range from annoying to life-threatening. Learn about diagnosis and treatment of this common immune reaction.
Disease

Generalized anxiety disorder

Excessive, ongoing anxiety and worry can interfere with your daily activities and may be a sign of generalized anxiety disorder, but treatment can help.
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