The present invention provide compounds, and pharmaceutical compositions thereof, encompassed by the formulae (I), (II) or (III).The present invention also provides methods for treating conditions associated with excessive FAAH activity by administering a therapeutically effective amount of a provided compound of the formulae (I), (II) or (III), or a pharmaceutical composition thereof, to a patient in need thereof. Additionally, the present invention provides methods for inhibiting FAAH in a patient by administering a therapeutically effective amount of a compound of the formulae (I), (II) or (III), or a pharmaceutical composition thereof, to a patient in need thereof.本發明提供化合物及其藥學組成物,包含式(I)、(II)或(III):本發明亦提供藉由投藥治療上有效量之所提供的式(I)、(II)或(III)之化合物或其藥學組成物至有需要的病患,以治療與過量FAAH活性有關之病況的方法。此外,本發明提供藉由投藥治療上有效量之所提供的式(I)、(II)或(III)之化合物或其藥學組成物至有需要的病患,以抑制病患體內FAAH的活性之方法。