A body temperature of 38.8°C or higher may be considered with Merlin 5-10 ml taken orally for temporary heat reduction. Merlin, also called ibuprofen suspension, is a non-steroidal drug that can provide antipyretic and analgesic effects. Therefore, this drug can be considered for symptomatic treatment when the body temperature rises with hyperthermia or even ultra-high fever. However, because it is a non-steroidal class, it can damage the gastrointestinal tract and should be used with caution in patients with stomach diseases or gastric ulcers. In addition, its use interval should be more than 6 hours before it can be taken again. Repeated use within a short period of time is not recommended and may aggravate the damage to the gastrointestinal tract and may even lead to acute gastric mucosal bleeding. However, this drug is used for antipyretic treatment in children, so it is relatively safe, only that it needs to be closely observed for gastrointestinal symptoms during the process of use.