The pain relief patches that we use in our clinic is LidoFlex. It is the only over-the-counter/non-prescription pain patch that delivers Maximum Strength Lidocaine through the localized delivery of 4% Lidocaine. LidoFlex can provide up to 12-hours of pain relief from minor aches and pains of sore muscles and joints associated with sprains, strains, and arthritis directly over the site of pain without the possible adverse effects of a prescription medication. LidoFlex’s form fitting and extremity specific shapes are designed to be worn during daily activities and are available for the knee, shoulder, neck, elbow, finger, heel and a universal flex strip for smaller areas.