YOU SAID:

My cousin needs his medicine

INTO JAPANESE

私のいとこは、彼の薬を必要があります。

BACK INTO ENGLISH

Must be his medicine is my cousin.

INTO JAPANESE

私のいとこは、彼の薬をある必要があります。

BACK INTO ENGLISH

My cousin must have his medication.

INTO JAPANESE

私のいとこは、彼の薬が必要です。

BACK INTO ENGLISH

My cousin, his medication is required.

INTO JAPANESE

私のいとこは、彼の薬が必要です。

BACK INTO ENGLISH

My cousin, his medication is required.