Blistex Helps lips restore healthy moisture balance. Cooling Relief: Lip Medex medicated ingredients deliver a noticeable and immediate cooling action to provide fast relief from the hot, itching sensations that accompany sore lips. Relief for Dryness: Lip Medex provides a special barrier that helps lip cells return to their natural moisture balance. Blistex Lip Medex is formulated to provide quick cooling lip relief you can feel working.