Then I learned that the problem was acid reflux, a relatively common condition in which stomach acid comes back up the esophagus and scalds the vocal cords, usually during sleep.

后来我了解到起因是胃酸倒流，这是很多人都会碰到的情况：通常在睡觉的时候，胃酸回流经过食道，烧伤了声带。

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Reflux drugs focus on neutralizing or reducing acid produced in the stomach.

治疗胃酸反流的药物主要通过中和及减少胃部分泌的胃酸起效。

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This can help reduce acid reflux when sleeping, as gravity keeps the acid in the stomach.

因为重力可以让胃酸流回胃里，所以这样有助于在睡觉时防止胃酸倒流。

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The patent on Prilosec, a stomach acid reflux drug made by London-based AstraZeneca (nyse: AZN - news - people), expires in April 2001, although it will likely be extended six months.

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Oral bisphosphonates -- which include drugs such as Fosamax and Boniva -- can upset the stomach and cause acid reflux, although it helps to take the medication as directed.

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Some 20% of Americans experience symptoms of reflux of stomach contents at least weekly, including a burning sensation in the chest or throat or regurgitation, according to the National Institutes of Health.

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