Blistex Lip Medex Medicated Analgesic Lip Balm temporarily relieves the discomfort of chapped lips and restores the lips' natural moisture. Blistex Lip Medex is formulated for fast, refreshing lip relief that you will feel immediately. In addition, Lip Medex visibly and immediately infuses lips with cooling action, temporarily and quickly relieving the burning and itching sensations that accompany cold sores and fever blisters. Apply to lips liberally 3 to 4 times daily.