Two bottles of diet pills is now sitting on my shelf. Both bottles contain weight loss supplement which contains phentermine. Phentermine diet pills is clinical proven to be 10-15% more effective in losing weight than diet and exercise. But as effective as it sounds, I stopped using it after reading about it’s side effects at phenterminedietpill.org. Which among many side effects include shortness of breath, chest pain, severe headaches, confusion, severe depression, seizures, insomnia, blurred vision and more.