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  • Anticoagulant medicines

    Anticoagulants are medicines that reduce the ability of the blood to clot. Read about why they're used, how you take them and what you need to bear in mind while taking them.

  • Angelman syndrome

    Read about Angelman syndrome, a genetic disorder that affects the nervous system and causes severe physical and intellectual disability

  • Androgen insensitivity syndrome

    Find out about androgen insensitivity syndrome (AIS), a rare condition that affects the development of a person's genitals and reproductive organs.

  • Alzheimer's disease

    Alzheimer's disease is the most common cause of dementia. Dementia is a group of symptoms associated with a decline in the way your brain functions, affecting your memory and the way you behave.

  • Alcohol-related liver disease

    Alcohol-related liver disease (ARLD) refers to liver damage caused by excess alcohol intake. There are several stages of severity and a range of associated symptoms.

  • Age-related macular degeneration (AMD)

    Read more about age-related macular degeneration (AMD), which mainly affects people over 50 years of age and usually leads to a gradual loss of central vision.

  • Addison's disease

    Addison's disease, also known as primary adrenal insufficiency or hypoadrenalism, is a rare disorder of the adrenal glands.

  • Acute respiratory distress syndrome (ARDS)

    Find out about acute respiratory distress syndrome, including who’s at risk of getting it, the symptoms, how it’s treated and what causes it.

  • Why weight loss surgery is done

    Find out why weight loss surgery might be recommended. The most common reason is to lose weight or help manage a condition that might improve if you lost weight.

  • How weight loss surgery is done

    Find out about the different types of weight loss surgery and how they are done.