Word: placebo
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...trial, called SELECT, which tested the preventive effects of vitamin E and selenium in more than 35,000 men, participants taking 400 IU of vitamin E daily or 200 micrograms of selenium each day, or a combination of the two, had the same rates of prostate cancer as the placebo group. In the second study, involving more than 14,000 physicians, those taking 400 IU of vitamin E every other day or 500 mg of vitamin C daily also had similar rates of prostate and other cancers as those popping placebo pills. (See TIME's 2008 Year in Medicine...
Another trial in Australia followed 30 cocaine injectors, 16 of whom were treated with dexamphetamine and 14 with a placebo. Cocaine-positive urine tests in the dexamphetamine group fell from 94% to 56%, while the placebo group showed no change after 14 weeks. A similar study of modafinil at the University of Pennsylvania in 2005 found reduced cocaine use in addicts...
...were able to separate out [the more and less severely addicted patients], and the more severe people were more responsive to the more potent stimulants," says Grabowski, who has conducted two randomized controlled trials involving nearly 200 patients, which found that dexamphetamine treatment reduced cocaine use better than a placebo...
...Treasury Department's latest prescription for the ailing housing market could turn out to be more placebo than cure, and a costly placebo at that. Some economists question whether just lowering interest rates to a historically low 4.5% will be enough to boost housing sales or prices. What's more, the plan could end up costing $25 billion a year, using up valuable funds needed to fix the housing market and providing no relief to the millions of homeowners now facing foreclosure...
...Ridker said that since this the study examined healthy individuals, researchers generally anticipate low short-term rates of disease. He added that the effect was “so striking between active therapy and placebo that an independent monitoring board felt compelled to stop the trial early, also resulting in low event rates...