Drugs are a medium for overcoming cultural mediation in order to reach immediate experience. Drugs are the mediation of the immediate. The inebriated man reaches, thanks to alcohol, hashish, and LSD, the concrete experience of the immediate, which is veiled for the sober man by the barrier of culture. He reaches, thanks to such media, the 'unio mystica', through which he dissolves into the concrete. He dives, thanks to such artifices, into the ineffable.

[…] People on drugs refuse to participate in the public space and they withdraw into the private space. To take drugs is a gesture that pushes away the republic, or that rejects it. […] it is an antipolitical gesture. 

There is no doubt that art is a drug. That it is a medium in order to propriate immediate experience. that it is an instrument in order to escape the unbearable ambivalence of cultural mediation and to emigrate toward a 'better realm', as Schubert sings in the Lied An die Musik, art sings. 

[…] However, in art there is an aspect that is missing in other drugs. Art, having mediated between man and immediate experience, inverts this mediation and makes it so that the immediate becomes 'articulated', that is: mediatized toward culture. Art turns utterable the ineffable and audible the inaudible. In it, the retreat of culture becomes an advance toward culture. The artist is the inebriate who emigrates from culture in order to reinvade it. 

Flusser, Post-History