The discovery of weight loss supplements that made spending hours in a gym and also adhering to a strict dieting program redundant to a specific extent, made a rage in the marketplace. They proved to be a blessing in disguise for the entire pharmaceutical industry, which in turn is modern earning of massive revenues with the sale of these pills. It's been estimated that over 20 million of Americans consume diet plan drugs each year.

The History of Diet Pills
It was during the ten years of 1950s when science and medicine had been creating striking achievements that these capsules had been initially prescribed by the doctors to the individuals. The medical doctors prescribed amphetamines, a drug used in the World War II to keep soldiers alert and active, for weight loss purpose. Among the side effects of amphetamines was appetite suppression that led doctors in prescribing them as slimming capsules. Eventually numerous weight loss individuals went through amphetamines led substance abuse issues as well as its prescription was inhibited.
It was in 1970s when health consciousness sprung up to its pinnacle as well as fitness became a world wide craze. Weight reduction became the identity of the game and the pharmaceutical industry saw an unexpected boom in the need for them. The first such pills in this era were essentially amphetamines derivatives, normally known as "speed". Afterwards, an assortment of fat loss pills flooded the market.
Food as well as Drug Administration (FDA) approved the drug fenfluramine (Pondimin) in as early as 1973, that had been followed by dexfenfluramine (Redux) in 1996. After that came the diet drug Phentermine, a sympathomimetic appetite suppressant, that was approved by the FDA in 1997. Numerous medical professionals prescribed Phentermine together with fenfluramine. The combined prescription of both the prescription drugs was aptly named fen phen.
The era of fen phen quickly declined with reports of heart valve disease resulting from the combined use of each drugs began to surface. The manufacturers withdrew dexfenfluramine as well as fenfluramine from the market, thereby ending the rule of fen-phen.
The most common weight reduction drugs that are recommended in the US are sympathomimetic appetite suppressants like Phentermine. These medications greatly influence the neurotransmitters in a best way to lean out stomach (you can look here) that brings about a loss in appetite.
Many other diet pills which received FDA approval are Orlistat (Xenical) and Sibutramine (Meridia), which received approval in 1999 and 2001 respectively. While Orlistat is a lipase inhibitor that inhibits the absorption of dietary oils into the human body, Sinutramine acts on mental via serotonin, norepinephrine and dopamine reuptake inhibition.