It is over the counter. 这是非处方药。

例句：
A:I am absolutely certain I'm going to fail my English test.
我敢肯定。我英语考试不会及格的。
B:What makes you so sure and why are you so pessimistic?
什么让你这么肯定？你为什么这么悲观呢？
A:Because it is impossible to improve listening level within a week.I'm not being pessimistic.I'm being realistic.
因为我不可能在一周之内提高听力水平。我不是悲观，是现实。
B:This is your only reason?
这就是你的原因？
A:Yes,I know my vocabulary and reading comprehension are pretty good.But my listening hasn't changed at all in a long time.It seems so hard to improve it,and I'm not exactly sure why.
是啊，我知道我的词汇和阅读理解非常好。但我的听力这么长时间都没有一点变化。看来很难提高了。我也不知道是什么原因。
B:Don't worry about it.Practice makes perfect.I'll lend you some listening materials so that you can practice more before the exam.I believe you can pass the exam with good preparation.
别担心，熟能生巧。我借你一些听力材料。你可以在考试前多加练习。我相信，如果你好好准备，你会通过考试的。
A:Thank you.That's very nice of you.
谢谢，你这真是太好了。

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