Buy Norco Online Limited-Time Discount Available. Norco is used for the Opioid situation. It is especially used as a mild pain reliever and also used for the relief from fever. It blocks the pain signal, and it helps to reduce fever. Norco 539 pills are taken orally. It can apply while our body hurts very much in a time of fever. It was also used for some time as a relaxing drug. When we take it, the patient should avoid the fat mile.