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an elevated, joyful mood and feeling of satisfaction and well-being not consistent with objective circumstances. Individuals experiencing euphoria are usually optimistic and impervious to negative affects. Euphoria may be combined with an accelerated flow of thoughts and a tendency to vivid fantasizing, energetic but unproductive activity, and disinhibited desires. It may also be combined with slow thinking, passivity, inertness, and apathy.
Euphoria may be induced by small amounts of alcohol, morphine, and other narcotics, by hypoxia (for example, mountain sickness), and often by severe bodily disease. It may also be a symptom of organic brain disease, such as the growth of tumors or progressive paralysis. It may be combined with signs of feeblemindedness.