“DL‐2‐amino‐5‐phosphonopentanoic acid (AP‐5), an NMDA receptor antagonist; and prazosin , an α1‐receptor antagonist; but not propanolol, a β2‐receptor antagonist; or yohimbine, a α2‐receptor antagonist; reversed the inhibitory effect of L‐Asp and NMDA on the histamine‐induced increase in GMBF.”