Weight loss drug Lorcaserin has proven efficacy for weight loss in overweight/obese adults.
The medicine works by suppressing appetite and should be taken twice a day. It costs around $220-290 (£155-225) per month in the US.
Scientists also found that Lorcaserin did not raise the risk of cardiovascular problems.
12,000 obese/overweight adults who suffer from atherosclerotic cardiovascular disease or multiple cardiovascular risk factors took part in the study. They were given Lorcaserin 10mg twice daily or placebo (a substance that is made to resemble Lorcaserin but do not contain the active ingredient).
The results showed that those taking Lorcaserin 10mg lost an average of 4kg over 40 months without the risk of further heart problems.
Lorcaserin is currently available in the US under the name Belviq.
The drug is not available in the UK or EU, as it would need a European license and be approved by NICE before doctors can start to prescribe Lorcaserin.
It is estimated that 1 in 4 adults in the UK are overweight/obese.
To read more about the study, CLICK HERE