24 de setembro de 2020

Animation: The Rise and Fall of the Cocaine High

15 de agosto de 20183min

Research indicates that the speed with which a drug of abuse enters and leaves the brain affects how “high” it makes users feel. “Highs” tend to be more intense when a drug abruptly floods the brain and then rapidly washes out. This observation is important because the intensity of the “high” influences how much users will want to repeat the experience—hence, how addictive the drug is. Accordingly, “fast-in, fast-out” drugs tend to be more addictive.

Cocaine is a highly addictive drug. This animation shows the rapid passage of the drug through the brain. It demonstrates that the intensity of the cocaine “high” parallels the trajectory of cocaine levels in the brain. Volunteers who had never used cocaine before were injected with the drug and were asked to rate their ensuing “high” at frequent intervals. Meanwhile, using positron emission tomography (PET) imaging, the researchers tracked the passage of cocaine through the brain.


Fowler, J.S.Volkow, N.D.Wolf A.P. et al. Mapping cocaine binding sites in human and baboon brain in vivo. Synapse 4(4):371-377, 1989. Abstract

Volkow, N.D.Ding, Y.S.Fowler J.S. et al. Is methylphenidate like cocaine? Studies on their pharmacokinetics and distribution in the human brain. Archives of General Psychiatry 52(6): 456-463, 1995. Abstract


21 de setembro de 2020

Depressão, ansiedade e álcool

21 de setembro de 2020

Comorbidade em transtornos mentais

21 de setembro de 2020

O Cérebro e a Drogas

Sobre a UNIAD

A Unidade de Pesquisa em álcool e Drogas (UNIAD) foi fundada em 1994 pelo Prof. Dr. Ronaldo Laranjeira e John Dunn, recém-chegados da Inglaterra. A criação contou, na época, com o apoio do Departamento de Psiquiatria da UNIFESP. Inicialmente (1994-1996) funcionou dentro do Complexo Hospital São Paulo, com o objetivo de atender funcionários dependentes.