... responding verbally; the levels of serum creatinin kinase and aspartate aminotransferase were more than 100-times the normal limits. On hospital day 2, he became rigid, diaphoretic and had a temperature ... and precursor of γ-aminobu- tyric acid (GABA), and also a potent inhibitory neurotransmitter [2]. GHB has a distinct pre- synaptic receptor in the brain [3], and is an agonist of GABA B receptors ... phencyclidine from human body fluids by head- space solid-phase microextraction (SPME). Chromatographia 43:331–333 14) Nakahara Y, Takahashi K, Sakamoto T et al. (1997) Hair analysis for drugs of abuse...