Serotonin syndrome. Serotonin syndrome is a potentially life-threatening drug reaction that may occur following therapeutic drug use, inadvertent interactions between drugs, overdose of particular drugs, or the recreational use of certain drugs. The excess serotonin activity produces a spectrum of specific symptoms including cognitive, autonomic, and somatic effects. The symptoms may range from barely perceptible to fatal. Numerous drugs and drug combinations have been reported to produce serotonin syndrome.
middle finger (plural middle fingers) 1  The finger between the forefinger and the ring finger; this is the longest finger. 2  An obscene gesture directed towards another as an insult: a literal or sometimes figurative raising of the middle finger at someone.
index finger (index fingers plural) Your index finger is the finger that is next to your thumb. n-count (=forefinger). little finger (little fingers plural) Your little finger is the smallest finger on your hand. n-count. ring finger (ring fingers plural) Your ring finger is the third finger of your left or right hand, without counting your thumb.