Saturday, August 19 2006, 12:05 BST - by Susanna Regan Patricia Arquette has talked about her disbelief at being asked to lose weight for her role in Medium. The actress had recently given birth when she signed on for the part of psychic detective Allison DuBois in the series, but refused to tone up as she did not think it would be true to the character. Talking to Contactmusic, she revealed: "When I started Medium I'd gained a stone and a half from having my daughter Harlow. The producer said, 'Honey, you've got to lose some weight'." "I felt like saying, 'I don't want to do this job then,' because, to be honest with you, I'm trying to make little changes in the world. If it made any sense for this part - if this part was a supermodel or anorexic - then okay. But DuBois is a mother of three in a long-term marriage. It doesn't make sense," Arquette explained.