HI, thanks for using healthcare magic Darolac z is a probiotic. Probiotics can be helpful in persons with diarrhoeal symptoms. If this particular probiotic is not available at your local pharmacy, other examples are: accuflora, align, culturelle, activa, tuzen, floraster. He should be given enough fluids to prevent dehydration and his hydration status monitored. Dehydration results in decreased urination, dry skin, increased heart beat, dry mouth and mucous membranes in the eyes, excess drowsiness, confusion. The best fluid would be one with replacement electrolytes. i hope this helps