  In the framework of QCD at finite temperature we have obtained dissipative
terms for the effective potential between $q$ and $\bar q$ which would partly
explain the $J/\psi$ suppression in the Quark Gluon Plasma (QGP). The
derivation of the dissipative potential for QGP is presented and the case for
Hadron Matter (HM) is briefly discussed. The suppression effects are estimated
based on simple approximations.
