Falkenham's topical cream works by targeting the macrophages that have remained at the site of the tattoo. New macrophages move in to consume the previously pigment-filled macrophages and then migrate to the lymph nodes, eventually taking all the dye with them.
Falkenham is still testing the cream on tattooed pigs, not humans, so he's not sure how long it'll take to remove tattoos completely. But I'm hoping that if I get a tattoo now, by the time my fickle heart rejects it, the cream'll be available. The estimated cost per ten-by-ten centimeter application is 4.5 (Canadian!) cents, so even if it takes a month of daily treatments, it'll still likely be way cheaper than other removal options.
Now, if you're desperate to remove a tattoo but can't wait until Falkenham starts actually selling his ointment, you're probably better off splurging on a laser treatment instead of going for the current crop of so-called removal creams on the market. None have been approved by the FDA, and the Mayo Clinic warns that they may help fade or lighten the ink, but they are not proven to truly remove tattoos and they could give you a nasty rash.
source: gizmodo.com by Kate Knibbs