Numb away tough back and muscle pain with the power of Aspercreme Pain Patches With Lidocaine. Formulated with 4% lidocaine, the maximum strength available without a prescription, this maximum strength pain patch penetrates muscles for powerful relief. Aspercreme Pain Patches work fast and target more pain receptors than other counterirritant topical pain relievers. Best of all, these lidocaine pain relief patches have no odor for discreet pain relief whenever and wherever you need it. Wear Aspercreme Pain Relieving Patches for up to 12 hours.