<prompt> A triphasic withdrawal syndrome follows an abrupt discontinuation of ___ use.AlcoholLSDHeroinCocaine  <response>: Cocaine use produces a mild physical, but a strong psychic dependence. A triphasic withdrawal syndrome follows an abrupt discontinuation of chronic cocaine use. Signs and symptoms : In the early phase crash phase, 9 h to 4 days, there is anorexia, depression, agitation, excessive craving, hypersomnia, fatigue and exhaustion which is followed by normal mood, anxiety and anhedonia next 4-7 days. In third phase extinction phase, after 7-10 days, there are no withdrawal symptoms, but increased vulnerability to relapse. Treatment : Bromocriptine and amantadine are useful in reducing cocaine craving. Gabapentin is being used in adult addicts. 