Fever reduction and pain relief can be achieved in about 10-15 minutes after taking Merrill, which means that the effects can be seen after 10-15 minutes. Merrill’s scientific name is Ibuprofen Suspension, and it can be used for children or adults with fever caused by the common cold or flu, as well as for mild to moderate aches and pains, such as toothaches, headaches, muscle aches, menstrual pains, and so on. Merrill is mainly ibuprofen, which inhibits the synthesis of prostaglandins in the body, thus reducing the inflammatory response, including fever and pain. Therefore, Merrill can be used to reduce fever and relieve pain. Under normal circumstances, its onset of action is usually 10-15 minutes after administration. If we use it to reduce fever, there will be heavy sweating 10-15 minutes after the medication is administered, and the sweat carries away a lot of heat, which can cause the body temperature to drop. Therefore, it is recommended to drink a lot of water at this time to prevent excessive sweating leading to a state of dehydration.