The concern is that aspirin's side effects, which can include bleeding ulcers, might outweigh the potential benefits when taken by many healthy or older people.

他们担心的是，很多健康人或老年人服用止痛药阿司匹林时，副作用可能大过潜在的好处。阿司匹林的副作用包括出血性溃疡。

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Experts warned, however, that aspirin can have serious side effects, including stomach irritation that can lead to ulcers and even fatal bleeding.

然而，专家同时警告说，阿司匹林有严重的副作用，包括对胃的刺激可导致溃疡，甚至是致命的胃出血。

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Experts have argued over the benefits of aspirin versus its risks, because the drug can increase the risk of stomach bleeding and ulcers.

目前，专家对服用阿司匹林的好处和风险也有异议，因为阿司匹林本身会增加胃出血和溃疡的风险。

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The risk of serious complications from aspirin and ibuprofen, including bleeding ulcers, is 7 per thousand.

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Separately, Celebrex's stomach benefit has also come under question, as Pfizer's own big trial was unable to prove that its Celebrex avoided the most serious complication of the older drugs, bleeding ulcers.

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Esophagitis can also trigger esophageal bleeding or ulcers after frequent exposure of the esophagus to stomach acid.

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