That product sucks. I personally spent a ton of time and money trying to sell it and the problem was we weren't able to get the margins, even when buying in huge quantities. We were in on it early, about this time last year, but weren't able to make anything happen.
GSK didn't want it becoming an online product so they refused to sell to anyone who wasn't a brick and motar store. Even then they would only sell through one of their approved distribution channels. When we finally got some,I think we were looking at $1 -$3 margins per bottle, and even when we were selling it at cost, it wasn't moving. Basically no one could move it, so everyone was dropping their prices to get out of the category.
I don't think it did very well for them. Granted this was a year ago, but there's no way I'd try to market it again.