Is it phentermine safe and does it work for weight loss. do i have to do a lot of exercise on this pill?

Exercise: Nothing compares to routine exercise and eating healthy. Avoid gimmicks like these pills. They can cause other health issuesandhabe interactions with other medications. A pill alone will not change your weight without appropriate management of calories and burning more calories.

Calories in n out: See the excellent answers on "weight loss". You basically need to burn more calories than you take in. Increase your exercise, choose healthier, less-caloric foods and drinks. The nice thing is that if u build more muscle you will even burn more calories while you sleep! and don't focus too much on weight. Focus more on pants-size, etc. Muscle weighs more than fat but that's ok--its good wt.