Although the company which makes the popular Phentramin-D is relatively new, their product is flying off the shelves at an incredible rate. Lazarus Labs, responsible for the manufacturing of this breakthrough drug, claims that it is one of the best non-prescription diet pills on the market. The weight loss solution is potent, effective, and safe for most users. Still, as with anything else, there are some precautions that should be taken, especially for dieters using it for the first time. Exploring the Most Common Side Effects of Phentramin-D For most users of Phentramin-D, serious side effects are extremely rare. Still, a certain level of mild discomfort has been reported by even the most responsible weight loss hopefuls.