TopCare Maximum Strength Pain Relief Patches provide targeted relief for minor muscle and joint pain using 4% lidocaine, a topical anesthetic that helps numb pain at the source. These single-use patches are designed for easy, mess-free application and can be worn for up to 12 hours to deliver consistent relief. Suitable for areas such as the back, shoulders, knees, and elbows, they are intended for adults and children 12 years and older when used as directed. Compare to Salonpas Maximum Strength Lidocaine Patch active ingredient.