Say no to diet pills

Thus far, I've lost about 20kg in total for the past 2 years. I was discussing the diet plans that I took with another girlfriend of mine yesterday and I was shocked to know that she actually lost 10kg in 3 months. She said that she took lipovox and it was the most effective diet pill she ever tried in her life. She was trying to convince me that this drug is safe for consumption but oh well, I think I will continue to stick with my healthy diet and a gym. I am just too afraid of the side effects of taking diet pills.