下药

下药	xià yào	to prescribe medicine / to drug; to poison
下	xià	down / downwards / below / lower / later / next (week etc) / second (of two parts) / to decline / to go down / to arrive at (a decision, conclusion etc) / measure word to show the frequency of an action
药	yào	leaf of the iris / variant of 药
药	yào	medicine / drug / substance used for a specific purpose (e.g. poisoning, explosion, fermenting) / CL:种,服,味 / to poison