YOU SAID:

This cough drop doesn't work

INTO JAPANESE

この咳止めは効きません

BACK INTO ENGLISH

This cough does not work

INTO JAPANESE

この咳は効きません

BACK INTO ENGLISH

This cough will not work

INTO JAPANESE

この咳は効かない

BACK INTO ENGLISH

This cough does not work

INTO JAPANESE

この咳は効きません

BACK INTO ENGLISH

This cough will not work

INTO JAPANESE

この咳は効かない