And some people would argue that changing form lamivudine to entecavir, a more potent drug, or telbivudine, a more potent drug, may be preferable to add-on purely for the cost aspects.

• 也有一些观点认为，从经济角度来考虑，将拉米夫定换成强效药物如恩替卡韦或者替比夫定，或许比加用药物更合适。