Clinical Hydration™:The moisture and emollient base in Blistex Lip Ointment hydrates and softens lip cells to alleviate cracking and seriously dry lips. It is so effective, it's clinically proven to elevate lip moisture, heal dry, chapped lips, and improve overall condition.omments about Blistex Medicated Lip Ointment, .21 oz : I can always count on Blistex to repair my chapped or dry lips. I find it much more effective than more costly, cosmetic brands. It gives a slight sheen and moist, healthy appearance to the lips.