It’s harder to answer the question of whether Merrill is effective when taken for five days in a row, if you’re asking whether Merrill is effective when taken for five days in a row? In fact, it does not take five days to know whether it is effective or not on the first day of taking it. If you ask if it will work after five days of continuous use, can I still use it? If Merrill is used for pain relief, it should not be used for more than five consecutive days. If it is used to treat fever, high fever, and reduce fever, it should not be used for more than three consecutive days. Merrill is the trade name and generic name of Ibuprofen Suspension, a non-steroidal anti-inflammatory drug mainly used for antipyretic and pain relief. The drug is able to take effect in 15 minutes after administration in terms of antipyretic, rapidly lowering the body temperature through sweating throughout the body. And used for analgesia, such as the treatment of headache, arthralgia, can also take effect after 15-20min after taking. However, because Merrill is ibuprofen, which has a significant stimulating effect on the gastrointestinal tract, it is stipulated that it should not be used continuously for more than three days to reduce fever. If it is used for pain relief for no more than five consecutive days, and if there is still pain after five days, other treatment options should be considered.