If i can take stool softeners to lose weight, should i take them?

Not for that reason: There is no meaningful or long-term weight loss with stool softeners--only temporary laxation of stool and maybe loss of some "water". A healthy and long-term approach to weight loss (and keeping the weight off once lost) is consistently making good food choices (avoid high-calorie density foods that are high in fat and processed sugars), minimize snacking, control portion size, and exercise.