Well, it's Halloween again, which means it's a great time to use silly horror movie-themed scenarios to sell products! Like for example, how about an eczema medication using The Exorcist as its model? The possessed girl gets some type of dermatitis that makes her skin look awful in that movie, so it could easily be used for such a purpose.
So in this ad, we'd see a frantic mother ask a doctor to check out her daughter, and she looks awful and is acting all nasty, and so the mother asks what's wrong, and the doctor says her daughter has eczema, an itchy and unsightly skin condition, and so it's no wonder she's acting so disagreeable. But the mother doesn't think it's so simple, so she calls a priest, who confirms the doctor's diagnosis, saying: "Yes, as it turns out, 90% of suspected spiritual possessions are actually eczema-related conditions or digestive tract trouble." And that's why he carries Dermarest with him (!) wherever he goes. And so he applies some Dermarest to the girl's skin, and she's instantly cured, calling out for her mommy and asking what happened to her. And then the announcer says: "Are you or someone you love possessed of eczema? Then use the eczema exorcist: Dermarest! Exorcise eczema and exercise your right to clear, healthy skin!"