Many people who are on diet pills, think that Phentermine is good for them. No doubt, it will give you a better result if compare to only exercise and on diet. However, it also comes with side effects such as chest pain, shortness of breath, severe headache, depression and so on. On top of all these, phentermine no prescription users might experience a rapid weigh gain, instead of losing weight! You always can look for alternative, rather than choosing Phentermine.