
PORTLAND, Ore., Dec. 9 (UPI) -- Several new sleeping pills on the U.S. market provide effective treatment for insomnia, but they have different effects and no drug stands out.
Reviewers from the Oregon Evidence-based Practice Center at the Oregon Health and Science University in Portland concluded that the drugs were better than placebo pills at treating insomnia.
The review included 141 studies of Sonata, Ambien, Lunesta and Imovane, a Canadian brand. The medicines are considered newer sleep aids, but have been on the market since 1992.
The drugs are commonly prescribed for insomnia in place of older sedatives such as benzodiazepines, marketed under brands such as Halcion, ProSom and Restoril.
There were few head-to-head comparisons of the drugs, however -- and "although there are some differences between the drugs on some outcomes, no one drug appeared to be consistently superior," said the Oregon reviewers, led by Susan Carson.
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