Niacin and niacin prodrugs are topically administered as suitable formulations to device for impoving the lipid profiles of subjects, preferably humans. A pilot synchronization symbol, which has known characteristics, is included as a first symbol of digital broadcast frames. The central contacts of both excitation coils are connected to each other. The second lead-in information area corresponds to a second playback mode different from the first playback mode. Other methods and embodiments are also contemplated.