Suggest Treatment For Loose Stool After Treated Cold And Cough

Hi, My child is 1.5 years old. He is not exactly suffering from loose motion. Normally he does potty only once a day in the morning. But since last week he is doing it twice. First one in the morning is normal, but the second one later in the day is liquid (in water form). He is drinking and eating fine, no fever. He just recovered from cold and cough. HIs doc (Pediatrician), recommended Rinifol Z syrup for him. But I am not sure whether to give him. Although he is not active enough. Thanks & Regards, Nutan Kanago