For the past week or so, I have been bingeing madly and have purged as well. But both yesterday and today... I have found that I cannot purge any food substance, but instead, just the fluid, water and even stomach bile, but absolutely no food has come up. Has this happened to anybody before? Also, this may sound ridiculous, but like with pain killers, is it actually possible for a body to grow an immunity against a laxative?