Anxiety disorder is an umbrella term that covers several different forms of a type of common psychiatric disorder, characterized by excessive rumination, worrying, uneasiness, apprehension and fear about future uncertainties either based on real or imagined events, which may affect both physical and psychological health. The disorders once classified as neuroses are now considered anxiety disorders. There are numerous psychiatric and medical syndromes which may mimic the symptoms of an anxiety disorder such as hyperthyroidism which may be misdiagnosed as generalized anxiety disorder.
Individuals diagnosed with an anxiety disorder may be classified in one of two categories; based on whether they experience continuous or episodic symptoms.
"Comfortably Numb" is a song by the English rock band Pink Floyd, which first appears on the 1979 double album, The Wall. It was also released as a single in 1980 with "Hey You" as the B-side. It is one of only three songs on the album for which writing credits are shared between Roger Waters and David Gilmour. The chorus melody was written by Gilmour while Waters contributed the lyrics and the music for the verses. The song had the working title of "The Doctor". An early version of the song was included under this title on the "Immersion Box Set" of The Wall, released in 2012.
The song is one of Pink Floyd's most famous, and is renowned especially for its guitar solos. In 2004, the song was ranked number 314 on Rolling Stone magazine's list of the 500 Greatest Songs of All Time. In 2005, it became the last song ever to be performed by Waters, Gilmour, Wright, and Mason together. In 2011, the song was ranked 5th in the BBC Radio 4's listeners' Desert Island Discs choices.
Panic attacks are periods of intense fear or apprehension that are of sudden onset and of variable duration from minutes to hours. Panic attacks usually begin abruptly, may reach a peak within 10 minutes, but may continue for much longer if the sufferer had the attack triggered by a situation from which they are not able to escape. In panic attacks that continue unabated, and are triggered by a situation from which the sufferer desires to escape, some sufferers may make frantic efforts to escape, which may be violent if others attempt to contain the sufferer. Some panic attacks can subside on their own over the next several hours. Often, those afflicted will experience significant anticipatory anxiety and limited symptom attacks in between attacks, in situations where attacks have previously occurred. The effects of a panic attack vary. Some, notably first-time sufferers, may call for emergency services. Many who experience a panic attack, mostly for the first time, fear they are having a heart attack or a nervous breakdown. Experiencing a panic attack has been said to be one of the most intensely frightening, upsetting, and uncomfortable experiences of a person's life and may take days to initially recover from. Repeated panic attacks are considered a symptom of panic disorder. Screening tools like Panic Disorder Severity Scale can be used to detect possible cases of disorder, and suggest the need for a formal diagnostic assessment.
Science of drugs including their origin, composition, pharmacokinetics,
pharmacodynamics, therapeutic use, and toxicology.
Pharmacology (from Greek φάρμακον, pharmakon, "poison" in classic Greek; "drug" in modern Greek; and -λογία, -logia "study of", "knowledge of") is the branch of medicine and biology concerned with the study of drug action, where a drug can be broadly defined as any man-made, natural, or endogenous (within the body) molecule which exerts a biochemical and/or physiological effect on the cell, tissue, organ, or organism. More specifically, it is the study of the interactions that occur between a living organism and chemicals that affect normal or abnormal biochemical function. If substances have medicinal properties, they are considered pharmaceuticals.