Mederma Skin Care for Scars Mederma Skin Care for Scars Mederma Skin Care for Scars is a soothing topical gel that is formulated with Cepalin, which is a botanical extract. Mederma Skin Care for Scars should be generously applied and gently rubbed into the scar 3-4 times a day for eight weeks on new scars, and 3-4 times a day for 3-6 months on existing scars. Mederma Skin Care for Scars helps scars resulting from; Surgery Injury Burns Acne Stretch Marks Mederma Skin Care for Scars is the number one Physician Recommended product for scars. Each tube has a net weight of 1.76 ounces (50g).