The main active ingredient of Merlin is ibuprofen, mainly with antipyretic and analgesic effect, this drug is an allopathic drug, can not be used for a long time, if used for fever is generally used for more than three days, if the symptoms are not significantly relieved, must promptly go to the hospital. The main component of Merlin, ibuprofen, is a non-steroidal anti-inflammatory drug, which has an antipyretic and analgesic effect, by inhibiting the synthesis of prostaglandins, thus playing a corresponding role. This drug can be used to reduce fever in infants and children, to relieve the symptoms associated with colds and flu, for example, to relieve headaches, sore throats and other pain, and also to treat toothache. In short, Merlin is an allopathic medicine, and if the symptoms are not relieved after three days of use, you must go to the hospital in time.