Can Diet Medication be Harmful?

There has to be a certain amount of caution about purveyors of diet pills offering medication such as phentermine without prescription on the Internet. Any medication that is actually a prescription drug, needs to be controlled carefully and with due diligence.
It pays to do a certain amount of research into side-effects of any medications before embarking on a course of treatment, and it is even more vital that any course of treatment should be overseen by a medical professional.