The present invention relates to methods for regulating neurotransmitter systems by inducing a counteradaptation response. According to one embodiment of the invention, a method for regulating a neurotransmitter includes the step of repeatedly administering a ligand for a receptor in the neurotransmitter system, with a ratio of administration half-life to period between administrations of no greater than 1/2. The methods of the present invention may be used to address a whole host of undesirable mental, neurological and physiological conditions.