Description_x000D_ Application_x000D_ Halopemide, a non-specific phospholipase D (PLD) antagonist, may be used with selective PLD antagonists (CAY10593, a PLD1 antagonist; CAY10594 or ML298, selective PLD2 antagonist) to help define the role and physiological effects regulated by phospholipase D enzymes. Halopemide may be used as the basis of the design and development of more selective PLD antagonists._x000D_ Packaging_x000D_ 5, 25 mg in glass bottle_x000D_ Biochem/physiol Actions_x000D_ Halopemide is a dopamine receptor antagonist and a phospholipase D2 inhibitor. Halopemide may be used as a screen to identify inhibitors of human PLD2 using an in vitro biochemical assay. It is also inhibitory at benzodiazepine binding sites.