Medrex LS Oral Drops comprises three active ingredients that together help treat wet cough (cough with mucus), acute sore throat and asthma in children. It also relieves throat irritation, clears congestion, and enables easy breathing in your child. Medrex LS Oral Drops makes it easier for your child to cough out the mucus by increasing its water content and making it thin enough to be coughed out. Give this medicine to your child by mouth with or without food along with a full glass of water. If your child develops an upset stomach, prefer giving it with food.You may require to give this medicine to your child for a few days to weeks, depending upon the severity of the infection. For maximum benefit, do not stop the medication abruptly by yourself even if your child starts to feel better and continue the medicine until the full prescribed course. Do not give more than the prescribed dose for fast relief as it may cause unwanted effects and worsen your child?s condition.Some of the common side effects of this medicine include excessive production of saliva, fatigue, headache, dizziness, nausea, vomiting, diarrhea, stomach discomfort, rash, tremors, and numbness or tingling sensation in the hands or feet. Usually, these episodes subside once your child?s body adapts to the medicine. However, if these effects persist or become bothersome for your child, report to your child?s doctor immediately.Narrate your child?s complete medical history, including any previous episode of respiratory illness, allergy, heart-problem, blood disorder, birth defects, airway obstruction, lung anomaly, sinus issues, liver impairment, and kidney malfunction. This information is critical for dose alterations and for planning your child?s overall treatment.