Fleas on Cat

Is there a natural remedy for a cat with fleas? If so, do you have some available? The dear is really itchy and irritated.
Have tried rubbing her with chamomile leaves.

Pennyroyal is effective for controlling fleas. You can rub fresh leaves on the animal.
Pennyroyal oil also works, but it is not safe to use on pregnant animals because pennyroyal in the concentrated oil form is an abortifacient.