Those there herbs worked into fat, they've got a lot of good in 'em.

Maybe the herbs would work by themselves.

"Maybe next week the herbs will work."

In this case, herbs probably will work wonders for the patient.

"I feel sure that this time the herbs will work."

The registration scheme for herbs requires no information whatsoever about whether the herb works, It is entirely to do with safety.

Your herbs are already working, and this fever has exhausted me.

Every herb and massage worked toward this end.

(New research suggests that this herb works as well as antidepressants and has few side effects.)

As for valerian, there's no recommended dosage, and it's not clear how the herb works.