For orlistat, steatorrhea produces the principal gastrointestinal side effects.

对奥利司他而言，脂肪痢是主要的胃肠道副反应。

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Only orlistat (Xenical) has been approved by the FDA for long-term use.

FDA只认可奥利司他(赛尼可)可以长期使用。

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After taking orlistat for a year, most people lose about 8.1 kilograms (about 18 pounds). That's about 2.8 kilograms (6 pounds) more than people who take a dummy treatment (a placebo).

服用一年，大部分人体重减轻约8.1公斤(约18磅)。

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"There is good evidence for the efficacy of Orlistat (Alli) in weight reduction but it should not be used as the sole element of weight management, " says Dr Colin Cable of the Royal Pharmaceutical Society of Great Britain, who reviewed the products.

BBC: Slimming pills: Do the claims add up?

Riluzole, a treatment for Motor Neurone Disease, was provided by 94% of authorities, the obesity treatment Orlistat 96% and flu drug Relenza, 96%.

BBC: Drug prescribing methods queried