I've been prescribed extended (slow) release tramadol, 100mg dose twice a day. The doctor said to the them 12 hours apart. The problem is I'm not sleeping... literally 4 hours a night, and by 8am I'm shattered and having to nap for an hour. Can I take them 6-8 hours apart instead or will this mess up how they will work in my system? Ive only had 4 hours sleep for the last 5 nights in a row and im desperate! Thank you.