<prompt> Key symptom in alcohol withdrawal syndrome is:Sleep disturbanceVisual hallucinationsTremorsDelirium  <response>: Ans: C. TremorsKey symptom - Tremor.Withdrawal SyndromesSubstanceFeaturesOpioidYawningdeg, Insomnia, Dysphoric moodWater loss from different orificesdeg Lacrimationdeg, sweatingdeg, diarrheadeg, vomiting, Increased vitalsdeg BP, Pulse, RR, TemperaturedegPupillary dilation, piloerectiondegAlcoholHang over MCdegHallucinationsdeg usually auditory and illusionsdegInsomniadegTremorsSeizures Alcoholic seizuresRum fits: Classic signDelirium tremens:Occurs within 5 daysdeg of complete or significant abstinencedeg from heavy alcohol Recovery occurs within 7 daysCharacteristic features are clouding of consciousnessdeg, disorientationdeg, hallucinations mostly visual and auditorydeg, illusiondeg, autonomic disturbancesdeg, agitationdeg and insomniadeg.CocaineIncreased or decreased Sleep hypersomniadeg or insomnia Psychomotor activityVivid unpleasant dreamsdegIncreased apetite and fatigue 