No need to worry for loose stool. Give ORS if watery stool

Both antibiotic and urine infection can produce loose motion. If urine infection is suspected, required to send a catheter sample of urine for culture delivered to a reliable lab within an hour.  If culture proves infection, then the correct antibiotic should be given and the low grade loose motion tolerated. If infection is proven by culture,  the paediatrician will also advise further tests to see if there is any underlying condition that makes it likely to come again and cause damage to the kidneys.