What effect did the poppies have on Dorothy and the lion?

The red poppies, which had an overwhelming scent that made living creatures fall asleep. Dorothy and Toto succumbed, and the Scarecrow and Tin Woodman warned the Lion to run away as fast as he could to save himself. The Lion bounded away and the other two travelers made a chair with their hands and carried Dorothy and Toto out of the field. Along the way they saw their friend the Lion fast asleep, but they could do nothing for him as he was too heavy to carry. They laid Dorothy down in fresh air and waited for her to awaken.