14 y/o male with c/o rt lower quadrant pain/cramping off and on- more after eating. Stools have been dk greenish, and loose to firm. Occ nausea even after just water bolus and increase gas. Currently taking antibiotic Bactrim DS and Acidophylus 2 tab BID for irritation around G-Tube and Sinus inf. Always has taken Zantac and we have stopped Reglan. Does not seem to be intolerance to formula goes fine at night. Was having problems before the bactrim but the cramping and pain is new. Other concerns-Mom is having some of the same symptoms too which is new also.