Fastin® was the brand name of Phentermine produced by King Pharmaceuticals for SmithKline Beecham. In December 1998, SK-Beecham withdrew Fastin® from the market. Since Fastin® is no longer produced and sold, it is not included in our Pictures of the Phentermine section.
Adipex® is the brand name of Phentermine produced by Gate Pharmaceuticals. Please click here to view pictures and learn more about Adipex®.
Ionamin® is the brand name of Phentermine marketed by Celltech. Ionamin® capsules use a special delivery system, known as resin matrix, to deliver Phentermine. Although there are other Phentermine products on the market, none has this resin matrix. Please click here to view pictures and learn more about Ionamin®.
Ionamin is the timed-release resin form of Phentermine and Adipex is the brand name for Phentermine Hydrochloride. Ionamin`s timed-release form means that this tablet lasts longer, but with a milder effect, while Adipex is said to last 10-12 hours. However, the differences between these two are subjective.
No official clinical study has been conducted on the use of Phentermine in conjunction with Xenical. Prior to taking any prescription medicine, please inform your doctor or healthcare professional of your complete medical history, including any other medicines you may be taking (both prescription and non-prescription). Based on your medical history and any medications you are currently taking, your doctor will determine if you may safely take Phentermine and Xenical.
"Phen-Pro" is the combination (cocktail) of Phentermine (the "Phen") and a low dosage of Prozac (the "Pro"). Any one of the following antidepressants: Zoloft, Celexa, Luvox, Trazadone or Effexor may be used in lieu of Prozac.
The use of the antidepressant in the Phen-Pro cocktail is unrelated to depression. The cocktail is necessary because the effects of Phentermine, when used alone, lessen over time. The Phen-Pro cocktail enables Phentermine to work better and for a longer period of time.
Phen-Pro is considered an "off-label" use, meaning that the FDA, who often voice concerns regarding the mixing/combining of medications, does not approve it. However, once the agency has approved a drug, doctors may prescribe it at will.
The combination of Phentermine and Prozac does not appear to cause the problems that resulted from the usage of Fen-Phen.
No, Phentermine is not an Amphetamine. Phentermine is, however, similar chemically to the Amphetamines. In the diagram below, we have reproduced the molecular structures of Phentermine, Methamphetamine and Amphetamine.
The three molecules are chemically similar, but are not identical.