After taking Merlin, the fever can be reduced in about 1-2 hours. The exact time it takes for the fever to go down also depends on the temperature of the fever and the method used to reduce the fever. After taking Merlin, if the temperature is around 38℃, the fever will usually go down faster. If the temperature is too high, such as 39℃ or more, you need to take Merlin within 1 hour after taking it, and cooperate with physical cooling, such as drinking more water, repeatedly wiping with warm water or taking a hot bath to assist in reducing the fever, so that the temperature can be reduced more quickly. If older children want to achieve faster fever reduction, they can run and jump back and forth indoors, which is more conducive to the treatment of fever reduction. At the same time, during the disease must drink more water, water to drink more fever will also be faster.