Mederma Advance Plus Scar Gel is an allopathic medicine Secondary and off-label uses of Mederma Advance Plus Scar Gel have also been mentioned below. The key ingredients of Mederma Advance Plus Scar Gel are Allantoin, Cepalin. The correct dosage of Mederma Advance Plus Scar Gel depends on the patient's age, gender, and medical history. This information has been provided in detail in the dosage section.