The drug is usually used for 3 consecutive days, if the symptoms are not relieved after 3 days of use, such as fever and pain, you should go to the hospital again. The main component of Merlin is ibuprofen, which is a non-steroidal anti-inflammatory drug that inhibits the synthesis of prostaglandins, thus having an antipyretic and analgesic effect. This drug is mainly used for infants and children to reduce fever, relieve mild pain caused by colds and flu, such as headache and sore throat, and also have a certain effect on toothache. In short, Merlin is an antipyretic and analgesic drug that is generally used for 3 days. It is best to use Merlin only if the fever persists above 38.5°C and not more than 4 times a day. The main thing is that Merlin only plays a role in relieving fever, the most important thing is the anti-viral treatment, drink more water and more protein, the human body continues to high fever on protein consumption is very large. The high temperature does not recede can try Chinese medicine treatment, Chinese medicine in this acute disease has a very good effect. Generally after taking Merlin 0.5-1 hours later the body temperature will gradually drop, because the child is sweating to dissipate heat, so after taking the drug to replenish water. Merlin is used to reduce fever in infants and children, and to relieve mild headache, sore throat and toothache caused by cold and flu.