Lido-Plast Patch is a local anesthetic used to relief pain mild to moderate pain. When applied, it temporarily stops nerves in that specific area from sending pain signals to the brain. This helps relieve symptoms of musculoskeletal pain and inflammation. Lido-Plast Patch is for external use only. Use it exactly as directed by your doctor. Apply directly upon removal from the protective pack.  Avoid using the patch if the pouch is damaged or open. Wash your hand thouroughly after handling the patch and avoid contacting with your eyes. Keep out of the reach of children.Common side effects of this medicine include skin irritation, numbness, or skin dryness. This are usually mild and goes away on their own. However, if they persist or get worse, let your doctor know. Do not use this medicine if you have a known history of allergic reaction to lidocaine or any of the ingredients in this product. Although medicines used on the skin are not normally affected by other medicines you should let your doctor know if you are taking any other medicines to be safe. Ask your doctor for advice if you are pregnant or breastfeeding.