Which over the counter diet pill works the fastest?

foreveryours7
Okay so I'm going on a vacation in a month soon and I have gained some weight...15 pounds to be specific...and I'm not in the greatest Bikini body right now. I'm wanting to go on a diet pill along with my going to the gym and eating healthy (I'm a vegetarian) what do you guys suggest though personal experience and what results did you see and in what time frame?
Which over the counter diet pill works the fastest?
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