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The latest Fat Fighters
Fat Fighters
Drug companies are working on new medicines that tackle the growing problem of obesity
By Arlene Weintraub (BusinessWeek)
The pharmaceutical industry has struggled to come up with an obesity treatment that produces meaningful weight loss without scary side effects. Here's a look at what's available and what may be on the way.
Xenical
Company: Roche (RMMBY)
Status: On the market since 1999
How It Works: Prevents about a third of the fat a person eats from being digested Side Effects: Bowel distress
Alli
Company: GlaxoSmithKline (GSK)
Status: Sold over the counter since 2007
How It Works: Like Xenical, but at half the strength
Side Effects: Bowel distress
Meridia
Company: Abbott (ABT)
Status: On the market since 1997
How It Works: Affects the part of the brain that makes people feel full, sending a signal to the brain to stop eating
Side Effects: High blood pressure, constipation, insomnia
Acomplia
Company: Sanofi-Aventis (SNY)
Status: On sale in 20 countries but not yet in the U.S. An advisory panel to the FDA voted against the drug in 2007, sending Sanofi back to the drawing board to do more studies.
How It Works: Acomplia hits the "cannabinoid" receptors in the brain, so named because they create the euphoria people feel when they smoke pot, as well as the munchies that follow. The idea is that blocking those receptors will also halt the munchies.
Side Effects: Depression, dizziness, memory loss, and other psychiatric issues
Taranabant
Company: Merck (MRK)
Status: In the final phases of testing before submission to the FDA, expected later this year.
How It Works: Like Sanofi's drug, it affects the cannabinoid receptors in the brain.
Side Effects: Upset stomach, depression, insomnia
Qnexa
Company: Vivus (VVUS)
Status: In the final phases of testing before submission to the FDA
How It Works: A combination of phentermine and topiramate suppresses appetite from two different brain pathways
Side Effects: Phentermine is an upper, while topiramate causes the brain to slow down. The company hopes the side effects will cancel each other out.
Lorcaserin
Company: Arena (ARNA)
Status: In the final phases of testing before submission to the FDA
How It Works: Designed to hit the same appetite-suppressing receptors in the brain that the combo fen-phen did, but without causing the heart valve issues that caused fen-phen to be pulled from the market
Side Effects: Headache, nausea, dizziness, fatigue
CP-945598 (No official name yet)
Company: Pfizer (PFE)
Status: In the final phases of testing before submission to the FDA
How It Works: Like Sanofi's and Merck's drugs, it blocks the cannabinoid receptors in the brain.
Side Effects: Stomach upset, headache, fatigue, insomnia
Contrave
Company: Orexigen
Status: In the final phases of testing before submission to the FDA
How It Works: Combines an anti-addiction drug and an antidepressant, which work together to regulate appetite and energy balance
Side Effects: Nausea, headache, dizziness
Pramlintide/leptin
Company: Amylin (AMLN)
Status: In mid-stage testing, with late-stage tests starting in 2009 at the earliest
How It Works: A combination of two human hormones that tell the body it's full and doesn't need to pile on any more fat
Side Effects: Nausea
Fat Fighters
Drug companies are working on new medicines that tackle the growing problem of obesity
By Arlene Weintraub (BusinessWeek)
The pharmaceutical industry has struggled to come up with an obesity treatment that produces meaningful weight loss without scary side effects. Here's a look at what's available and what may be on the way.
Xenical
Company: Roche (RMMBY)
Status: On the market since 1999
How It Works: Prevents about a third of the fat a person eats from being digested Side Effects: Bowel distress
Alli
Company: GlaxoSmithKline (GSK)
Status: Sold over the counter since 2007
How It Works: Like Xenical, but at half the strength
Side Effects: Bowel distress
Meridia
Company: Abbott (ABT)
Status: On the market since 1997
How It Works: Affects the part of the brain that makes people feel full, sending a signal to the brain to stop eating
Side Effects: High blood pressure, constipation, insomnia
Acomplia
Company: Sanofi-Aventis (SNY)
Status: On sale in 20 countries but not yet in the U.S. An advisory panel to the FDA voted against the drug in 2007, sending Sanofi back to the drawing board to do more studies.
How It Works: Acomplia hits the "cannabinoid" receptors in the brain, so named because they create the euphoria people feel when they smoke pot, as well as the munchies that follow. The idea is that blocking those receptors will also halt the munchies.
Side Effects: Depression, dizziness, memory loss, and other psychiatric issues
Taranabant
Company: Merck (MRK)
Status: In the final phases of testing before submission to the FDA, expected later this year.
How It Works: Like Sanofi's drug, it affects the cannabinoid receptors in the brain.
Side Effects: Upset stomach, depression, insomnia
Qnexa
Company: Vivus (VVUS)
Status: In the final phases of testing before submission to the FDA
How It Works: A combination of phentermine and topiramate suppresses appetite from two different brain pathways
Side Effects: Phentermine is an upper, while topiramate causes the brain to slow down. The company hopes the side effects will cancel each other out.
Lorcaserin
Company: Arena (ARNA)
Status: In the final phases of testing before submission to the FDA
How It Works: Designed to hit the same appetite-suppressing receptors in the brain that the combo fen-phen did, but without causing the heart valve issues that caused fen-phen to be pulled from the market
Side Effects: Headache, nausea, dizziness, fatigue
CP-945598 (No official name yet)
Company: Pfizer (PFE)
Status: In the final phases of testing before submission to the FDA
How It Works: Like Sanofi's and Merck's drugs, it blocks the cannabinoid receptors in the brain.
Side Effects: Stomach upset, headache, fatigue, insomnia
Contrave
Company: Orexigen
Status: In the final phases of testing before submission to the FDA
How It Works: Combines an anti-addiction drug and an antidepressant, which work together to regulate appetite and energy balance
Side Effects: Nausea, headache, dizziness
Pramlintide/leptin
Company: Amylin (AMLN)
Status: In mid-stage testing, with late-stage tests starting in 2009 at the earliest
How It Works: A combination of two human hormones that tell the body it's full and doesn't need to pile on any more fat
Side Effects: Nausea