I have been prescribed MA for my severe, often pre-menstrual period pains, thought to be due to endometriosis. They work well, however I would prefer to take a version that does not contain colourings. A pharmacist told me there was a version of 250mg that came as a white tablet, so I got my prescription changed from 500 to 250, but now no pharmacy seems to know of it. - Does anyone know? (Sue, United Kingdom)