If you are on placebo, you stop
placebo at week 12 and continue other meds until week 48, plus visits until week 72. If you are on
placebo the first time you are on the study, you are guaranteed the real drug next time at no cost.
Since it's a double blind study, no one knows what you are on until week 24. So far there have been excellent results, like cakes8267 said, read previous posts, this is very promising!
Good luck.