Well the first ingredient is bitter orange peel. That contains a chemical that is a legal variation of ephedrine, known as synephrine. This family of chemicals has been known to increase the risk of stroke and heart disease.
L-Tyrosine is an amino acid, no strong links to advantages in
weight loss.
Green tea extract is harmless. Some studies point to a 1-4% increase in resting metabolic rate but that isn't much in the big picture. You're better off brewing a few cups a day and drinking it because it's relaxing.
153mg of caffeine is about the same as a 16oz
energy drink. This will probably exacerbate dehydration depending on how much water you drink a day.
Mixed studies on Guarana... some say it aids in
weight loss but most agree it's rather harmless.
Capsaicin and Bioperine aid in reducing inflammation which may be driving
stress-based
weight gain
Some B vitamins and chromium, a mineral, helpful in the right doses for obvious reasons.
Basically bitter orange peel is the most dangerous ingredient, the rest are harmless with
weight loss effects based on scattered studies.
If you really want to take it, a waste of money in my opinion, then talk to your doctor about it. They'll be able to refer to resources we don't readily have available like drug and chemical interaction guides. 
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