D.W.
I'd HIGHLY recommend not using a product such as this as it's not been approved by the FDA. A few years ago, there were major issues with both Hydroxy Cut and Xenadrine.
There are only a few products on the market that are FDA-approved for weight loss (though there are a few others that may be prescribed off-label by a physician)
1. Xenical - also called Alli over the counter
It's a fat blocker, so 30% of your ingested fat does not get absorbed by the intestines. It had some news last year regarding liver toxicity issues. Side effects can be managed by watching your fat intake, but if they happen, they're usually quite embarrassing (I used to sell it and hear about it from doctors often)
2. Meridia
It is less commonly used as it has an effect on your cardiovascular system that can be dangerous in some patients.
3. Phenteramine
Part of the infamous fen/phen combo that caused a lot of problems about 10 years ago. Fenformin was pulled off the market - it was the real problem. It's commonly used, but there's little data to show it's worth it long term.
The two recommendations I'd make are to join something like Weigh Watchers (everyone I know who's done it has been wildly successful - including people who only had a few pounds to lose and needed accountability) and to talk to a dietician to see if they can make dietary adjustments that may help you increase your metabolism or help control your hunger in the afternoons without affecting your caloric intake.
Good luck.