The physician made a prescription against sea-sickness for him.是什么意思？

The physician made a prescription against sea-sickness for him.

医生给他开了个治晕船的药方。

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

physician

n. 医生，内科医生，<口>医学博士，（精神创伤的）医治者，抚慰者；

例句
...an excellent physician who commanded the respect of all his colleagues...
赢得所有同事尊敬的优秀的内科医生

made

adj. …制的，（人工）做成的，拼成的，虚构的，保证成功的；v. 使(make的过去式和过去分词)；

例句
Single people are treated as an aberration and made to pay a supplement.
独身者被当成异类，而且要付一笔额外的费用。

prescription

n. [医]药方，处方，处方药，训令，指示，法规；

例句
Are you taking any other medicines whether on prescription or bought over the counter?
你在服用其他什么处方药或非处方药吗？

against

prep. 反对，对…不利，紧靠，以防；

例句
His hand brushed against hers; it could have been either accidental or deliberate.
就在有意无意间，他的手轻轻拂过她的手。

for

prep. 为，为了，倾向于，关于，当作；conj. 因为，由于；

例句
I've come looking for a bit of advice.
我特来讨教。

him

pron. (he的宾格)他；

例句
They said goodbye to him as he got aboard the train at Union Station.
当他在联合火车站登上火车之际，他们向他道别。