I'm actually a disabled former RN.Both myself and my pain specialist MD were taught there is no actual thing as a "normal" dose or a "top end dose" Each person has thier own variables that affect thier individual response to a certain dose, and it varies greatly from person to person and drug to drug.If you are still in measureable pain-the dose isn't high enough! Right now I take 90mg of extended release morphine every 8 hrs and can have 30mg oxycodone immediate release every 4 hrs if I need it for breakthrough pain. If you aren't seeing a board certified pain specialist-find one-NOW!! and if you have one and are still in alot of pain-you need to find a new one until you find one that's a good fit for you. Every state has an online listing of it's licensed physicians you can search by specialty.