There are many cases of teenagers who had harmful effects from diet pills. One example is a 19 year-old student died of apparent side effects from diet pills. She lost 25 kilograms after taking the pills for two months. Unfortunately, she got heart failure which finally caused her death (The Nation, 2011). Similarly, a 19-year-old girl who died of shock recently may have died from sibutramine in diet pills. In this case, sibutramine may be a leading killer as the victim had aortic stenosis as a congenital disease. It could cause broncho-constriction in a person with this disease (The Nation, 2014). Another example is a 17-year-old Singaporean girl who wanted to lose her weight. After taking the pills she immediately suffered from dizziness, light-headedness and heart palpitations. Fortunately, she decided to stop taking the pills or else she would have got lasting damage to her body and liver failure (Mei, 2014).