It depends on the strength of tablet, and the dose you were prescribed, the reason it was prescribed and you're weight/size/age. Best thing to do is to check with your doctor, and confirm on the label of your tablets what the recommended dose your doctor has said. Endone can make you drowsy, constipated, depress your respiratory system among other side effects. So I'd take care before taking too much of it. If you're pain isn't controlled with the dose you were prescribed then you need to see you're doctor to see if there are alternatives that can be taken instead or with the Endone rather then just increasing the dose of the Endone.