Merlin can be taken when there is a fever and the axillary body temperature exceeds 38.5°C or more. Of course, it also needs to be determined according to the patient’s condition. If the patient expresses intolerable discomfort compared to fever, it is also possible to take it when it is lower than 38.5℃. Merlin is a non-steroidal antipyretic and analgesic, which can have an irritating effect on the intestinal tract, so it is best to take Merlin after a meal and not on an empty stomach. In addition, after taking Merlin, make sure to drink more water to promote fever reduction. There are many causes of fever in the organism, and it is important to take Merlin while treating the cause of the fever. If it is caused by a cold, you should also take cold medicine, and if it is caused by an inflammatory infection in the body, you should take anti-inflammatory medicine. In other words, the cause of the fever should also be treated while taking Merlin, and only then can the body temperature be better controlled.