Fenfluramine Phentermine – What’s The Fen-Phen Difference

Fenfluramine is one of the popular medications used to treat obesity. It is also considered as a component of Fen-phen. This drug fen-phen has already taken off few years back. When it comes to usage both fenfluramine and phentermine resemble fen-phen but they are not same. Dexfenfluramine is commonly known as fen-phen. Due to their dangerous side effects both the anti-obesity drugs dexfenfluramine and fenfluramine are taken off from market in many countries. Apart from these two the next popular weight loss drug is phentermine which is still available in market but can be purchased only through prescription; they are a banned obesity drug combination.

Earlier when fen/phen was in the market and many people were using it. But the main side effect caused by this drug was abnormal echocardiograms. This side effect if not treated immediately will result in serious health conditions. This is the reason it has been banned.

Many studies have proved that the combination of phentermine and fenfluramine will result in issues related to heart valves. Both the drugs fenfluramine and dexfenfluramine have abilities to activate receptors of serotonin on the heart tissue. This results in damages.

banned obesity drug combination

Type 2 diabetes, high cholesterol, and high blood pressure are the listed co-morbidity factors that which increase the chances of serious health conditions and may lead to death.


If it is for short term use and individual follows the instructions as per physician, then phentermine can be very effective in weight loss. There are many success stories where people used phentermine for weight loss and got results. This is a banned obesity drug combination. Few studies have also shown that new fen/phen also called as Belviq can also be very effective aid in weight loss.

Manufacturers of Belviq state that an individual can lose at least 5% of their body weight if they follow this drug for three months. Since earlier many people have affected from fen/phen, before releasing Bleviq there were studies conducted on thousands of patients and studies have confirmed that Belviq will not result in issues like harming the heart valves like fen/phen. So, Belviq can be safe if used for short term. Long term use of this drug is yet to be studied.

In case of chronic weight loss management programs Belviq can be used. It is recommended when an individual has a body mass index of 30 or more. If the individual’s body mass index is 27 or more and he is suffering from weight related issues then also Belviq can be used.