Ultra Omega Burn loss pills affect the receptors in the body's system that regulates things such as energy level, food intake, metabolism and also fear and anxiety. So far, the reason for the differences in side effects is unknown. Dosage could be a factor. Less taranabant is needed to produce similar weight loss. Rimonabant and taranabant also have slight differences in how they interact with the receptors. It is unclear for now why there are fewer side effects in one new weight loss pill and not the other...