Hello Doctor, I have been suffering from IBS. However,  for the past 1 month, my symptoms have worsened significantly. Almost every time I eat, I experience loose motions either immediately after a meal or within a couple of hours. Due to this condition I have experienced significant weight loss. My weight has reduced from 94 kg to 83 kg in 1 month without any intentional dieting or increase in physical activity. I checked with nearby Doctor as per his advice i took Orni-0, Entroginol and Nexpro RD 40 but no help. Kindly advise what tests or investigations I should undergo and the appropriate treatment.