Medications
Learning Center
Down syndrome
Down syndrome is a genetic disorder caused when abnormal cell division results in extra genetic material from chromosome 21.
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.
Dry orgasm
It's possible for men to reach sexual climax without ejaculating. Learn about the possible causes.
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.
Dust mite allergy
Dust mite allergy can lead to year-round sniffles and sneezes. Here's how to find relief.
Dwarfism
Very short stature of 4 feet 10 inches or less that results from a genetic or medical condition is considered dwarfism. Learn about causes and treatment.
Dyslexia
This learning disorder involves difficulty reading due to problems identifying speech sounds and learning how they relate to letters and words.
Ear infection (middle ear)
These usually get better on their own, but sometimes medicine is needed. Find out more about how doctors diagnose and treat this common ear condition.
Ear reconstruction
Learn about this cosmetic procedure, which is done to rebuild an ear. Understand the risks and learn what to expect after surgery.
Earwax blockage
Learn simple steps for treatment and self-care of this common problem, including earwax removal.
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