YOU SAID:

Sir, you need to take your medicine.

INTO JAPANESE

先生、薬を飲む必要があります。

BACK INTO ENGLISH

The teacher needs to take medicine.

INTO JAPANESE

先生は薬を飲む必要があります。

BACK INTO ENGLISH

I have to take pills.

INTO JAPANESE

薬をしなければいけません。

BACK INTO ENGLISH

Must be the drugs.

INTO JAPANESE

薬をある必要があります。

BACK INTO ENGLISH

There must be a medicine.

INTO JAPANESE

薬があります。

BACK INTO ENGLISH

There are drugs.

INTO JAPANESE

薬があります。

BACK INTO ENGLISH

There are drugs.