Taking medication to Dubai help needed

Hi does anybody know about taking medication into Dubai? I've heard many different reports about needing a permit for controlled drugs? I am taking Tramadol for back pain. I've rang the embassy and they've stated to provide a doctors note and copy of the prescription which I have got. But i don't know if I need any other documentation? I've even read you need permission from the ministry of health prior to travel. HELP from someone would be greatly appreciated.