Whether an 18-month-old baby with unformed stool needs medication should be determined according to the specific triggers and whether it is accompanied by other uncomfortable symptoms. If it is physiological factors are not need to use drugs, if it is gastrointestinal dysfunction, intestinal infections and other reasons, need to give bifidobacteria, montelukast and other drugs to treat. 1. Physiological factors: for example, 18-month-old baby’s abdomen is cold, eat too much, eat greasy, may lead to unshaped stools. In this case, if the baby is not accompanied by any other discomfort, no medication is needed, and dietary adjustments are recommended, such as controlling the baby to eat some light, easy-to-digest food, eating small meals and paying attention to abdominal warmth. 2. Gastrointestinal dysfunction: If the 18-month-old baby’s stool is not shaped, caused by gastrointestinal dysfunction, may also be accompanied by abdominal pain, diarrhea and other symptoms, this situation usually need to use drugs. Can be directed by the doctor to apply probiotics to regulate, such as bacillus subtilis bifidus, bifidobacterium, etc., is conducive to the regulation of intestinal flora, promote the balance of bacterial flora, so as to improve the above symptoms. 3. Intestinal infections: If the 18-month-old baby stool is not shaped, is due to intestinal infections, children are often accompanied by significant diarrhea, can be under the guidance of the doctor, the application of amoxicillin anti-infective, montelukast to stop the diarrhea, but also play a role in the protection of the gastric mucosa. It can be seen, 18 months of the baby stool is not shaped whether the need for medication, should be based on the specific situation, if accompanied by other symptoms, should be as early as possible to seek medical attention, the above drugs by the doctor’s guidance to use medication.