Hi all, should i be having headaches from the avinza, it is at the base of my scull and usually starts at about hour 18 or so... Is this because the morphine is leaving my system? I don't know if i should try taking it earlier to see if this will prevent my headaches?.. I have only been on it for 4 days and switched from 6 norcos a day.. The 30mg of avinza is not close to cutting the pain down, I am still taking 3 norcos per day for the b/t pain... Thank you for the help...I am so happy there are other people in a similar situation. My poor wife tries to understand but just can't, at least now i can relate with others.