Opioid
An opioid is any agent that
binds to opioid receptors,
found principally in the
central nervous system and
gastrointestinal tract.
There are four broad classes
of opioids: endogenous
opioid peptides, produced in
... > full story
Narcotic
A narcotic is an addictive
drug that reduces pain,
induces sleep and may alter
mood or behaviour. In US
legal context, narcotic
refers to opium, opium
derivatives, and their
semi-synthetic or fully
... > full story
Drug addiction
Drug addiction, or substance
dependence is the compulsive
use of psychoactive drugs,
to the point where the user
has no effective choice but
to continue use. Drug
addiction has two
components: physical
... > full story
Psychoactive drug
A psychoactive drug or
psychotropic substance is a
chemical substance that acts
primarily upon the central
nervous system where it
alters brain function,
resulting in temporary
changes in perception, mood,
... > full story
Browse Reference Articles
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Diet and Weight Loss
Nutrition
Dieting and Weight Control
Obesity
Attention Deficit Disorder
Nutrition Research
Gluten-free, casein-free diet
Many parents of children with autism have reported that a gluten-free casein-free diet helps their children. According to the theory, some children are unable to digest the protein in many cereals ... > more -
Attention Deficit Disorder
Healthy Aging
Sports Medicine
Today's Healthcare
Personalized Medicine
Diseases and Conditions
Placebo effect
The placebo effect, also known as non-specific effects and the subject-expectancy effect, is the phenomenon that a patient's symptoms can be alleviated by an otherwise ineffective treatment, since ... > more -
Healthy Aging
Attention Deficit Disorder
Sports Medicine
Sleep Disorder Research
Birth Defects
Sleep Disorders
Restless legs syndrome
Restless legs syndrome (RLS) is a poorly understood and often misdiagnosed neurological disorder. RLS (which is also sometimes referred to as Jimmy Legs, spare legs or "the kicks") may be described ... > more -
Alcoholism
Alcoholism is the consumption of or preoccupation with alcoholic beverages to the extent that this behavior interferes with the alcoholic's normal personal, family, social, or work life. The chronic ... > more -
Cluster headache
Cluster headaches are rare, extremely painful and debilitating headaches that occur in groups or clusters. Cluster headache sufferers typically experience severe headaches of a piercing quality near ... > more -
Premenstrual stress syndrome
Premenstrual Stress Syndrome (PMS, also called Premenstrual Stress, Premenstrual Tension, PMT, Premenstrual Syndrome, Periodic Mood Swing) is stress which is a physical symptom prior to the onset of ... > more -
Psychiatry
Attention Deficit Disorder
Healthy Aging
Mental Health Research
Disorders and Syndromes
Anxiety
Obsessive-compulsive disorder
Obsessive-compulsive disorder (OCD) is a psychiatric disorder; more specifically, it is an anxiety disorder. OCD is manifested in a variety of forms, but it is most commonly characterized by a ... > more
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