Loose motions in a 5-month-old baby should be managed mainly by preventing dehydration, continuing breastfeeding frequently (do not stop feeds), and, if advised by a doctor, giving small, frequent amounts of oral rehydration solution (ORS). Avoid giving any home remedies or over-the-counter medicines on your own. Enterogermina is a probiotic that can help restore healthy gut bacteria and is generally safe for infants, but it should only be used if prescribed by a paediatrician, who will guide the exact dose and how to give it (usually the liquid vial can be given directly or mixed with a little milk). Closely watch for signs such as reduced urine, excessive sleepiness, persistent vomiting, fever, or blood in stools, and seek medical care immediately if any of these appear or if diarrhoea lasts more than 1-2 days.