Dermaline was an injectable drug used to prevent sunburns.

In 2376, Neelix was so excited to be on a beautiful Norcadian beach that he forgot to take his dermaline injection. As a result, he ended up with severe burns from the planet's two suns, which he treated with leola ointment. (VOY: "Tsunkatse")

In gel form, it could be used to treat patients who had suffered first and second degree burns. (ENT: "Dear Doctor", VOY: "Deadlock")