Merlin can generally achieve a better therapeutic effect after 1 hour of use. If clinically necessary, it can be repeated for 4-8 hours and cannot be used more than four times per 24 hours, and long-term use is not recommended for patients. If the symptoms are not relieved by 3 consecutive days of medication, it is important to seek medical diagnosis promptly. Merlin, also known as ibuprofen suspension drops, is mainly used clinically to reduce fever in infants and children, and can relieve mild headache and sore throat caused by cold or flu. In addition, it is also useful for toothache relief. Merlin is an antipyretic and analgesic drug, mainly by inhibiting the synthesis of prostaglandins in the body, thus playing an antipyretic and anti-inflammatory role, mainly for infants and children, parents must pay attention to the dosage of infants and children in the process of use. When using Merlin, parents must follow the doctor’s instructions or follow the dosage recommended in the drug’s instruction manual, and should pay attention to shaking well before use, and do not use any more antipyretic and analgesic drugs containing ibuprofen or others.