<P>PROBLEM TO BE SOLVED: To treat undesirable mental and neurological conditions, by inducing a counteradaptation response to regulate neurotransmitter systems. <P>SOLUTION: There is provided use of μ and/or δ opiate receptor antagonist such as naloxone for preparing agents regulating endogenous endorphin neurotransmitter system by inducing a counteradaptation response. By repeatedly administering the agent to a patient, the μ and/or δ opiate receptor antagonist in the agent bonds to μ and/or δ opiate receptor and thereby counteradaptations are induced. <P>COPYRIGHT: (C)2011,JPO&INPIT 
METHOD FOR REGULATING NEUROTRANSMITTER SYSTEM BY INDUCING COUNTERADAPTATION