This article focuses on phentermine 30mg dosage. Is it the right one for someone looking for a way out of obesity? You most likely want to know the answer to this before taking the medication. Why not when you know all too well that the dosage you take will determine the effectiveness of the prescription? It might not work as per the expectations if it is too little. On the other hand, if it is too much, it might end up doing more harm than good.