Benzodiazepine withdrawal induced anxiety is treated by administration of an enkephalinase inhibitor, and a gamma-aminobutyric acid ("GABA") precursor, or an endorphin or enkephalin releaser. These components promote restoration of normal neurotransmitter function and are non-addictive. Use of the enkephalinase inhibitor D-phenylalanine, the GABA precursor glutamine, the serotonin precursor 5-HTP, glycine, and taurine, in combination with coenzymatic functionality of folic acid is preferred for activation of ligand-gated Cl.sup.- channel in the central nervous system. Food supplement embodiments provide the human body nutritional supplements to intake certain neurotransmitter precursor substrates, thereby enabling patients of all ages to self-regulate their ability to quell perturbations to equilibrium and simultaneously to adverse effects upon normal physiological and psychological functioning attributable to induced anxiety and panic associated with benzodiazepine withdrawal.