Will lidocaine patches 5% show up on a 12 panel drug test? And how long does it stay in your system?

No. Lidocaine is not part of the 12 drug panel. You may consult this site for information on this topic. https://www.anylabtestnow.com/tests/drug-test-12-panel-urine/ For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex.