These tablets are available over the counter.

这些药片不用处方就可买到。

He leaned over the counter so his face was almost level with the boy's.

他俯在柜台上，这样他的脸几乎和那男孩的脸一样高。

Are you taking any other medicines whether on prescription or bought over the counter?

你还要其他药吗，不管是处方药还是非处方药？

Can you get it over the counter?

那你能把它从柜子上拿下来吗？

You buy expensive over the counter medications.

你到柜台购买昂贵的药物。