To the research
Meta analysis
https://www.ncbi.nlm.nih.gov/pubmed/15051593
RCI
http://jama.jamanetwork.com/article....ticleid=188147
Nope. No significant weight loss beyond a placibo. So like most supplements, if it makes you feel better sure go ahead, but otherwise your just wasting yoru money on something that has been linked with Hepatotoxicity, though they have not done enough research to prove it, just that they are correlated.
Why is your pharmacy pushing this exactly?
Just avoid supplements for the most part, go carb light diet, lower calorie intake, boost calorie output, cardio.