Hi Thanks for writing to Health Care Magic Most important part in the management of diarrhea is fluid replacement therapy followed by nutritional management and anti-diarrheal drug treatment. It is very important that you should take Oral rehydration therapy (ORS) after evaluating the dehydration status. Regarding Nutrolin B, it is a probiotic. Probiotic are viable bacteria e.g. lactobacilli or yeasts usually present in fermented dairy products e.g. curds, yogurt, lassi etc. or available commercially like Nutrolin B. Nutrolin B contains Lactic acid bacilli which gram-positive lactic acid producing organisms which proliferate in the small intestine, thus creating an environment unfavorable to the growth of potentially pathogenic fungi and bacteria. Nutrolin B is prescribed to prevent persistent diarrhea due to secondary lactose intolerance. Nutrolin B is indicated for reduction of tiredness due to loose motion rather ORS therapy takes care of the same. Hope that answers your query. Take Care :)