The majority of loose movements are caused by viruses or food, in which case antibiotics won't help. Therefore, you shouldn't take antibiotics like Norflox-TZ unless a doctor verifies a bacterial illness. If there is no high temperature or blood in the stool, imodium (loperamide) can be used to lessen diarrhea, but it must be taken as prescribed by a physician.

Imodium helps only with diarrhoea, not with gas, acidity, or indigestion. Your bubbling and pain are more likely due to gas/indigestion from the pizza. Antacids, simethicone, or ORS may help. If pain, vomiting, or diarrhoea worsens, get medical attention.