A nurse is instructing a client who is newly diagnosed with pulmonary tuberculosis (TB) about the use of antitubercular medications. Which of the following information should the nurse include in the teaching?

A typical course of treatment involves 6 to 9 months of consistent medication use.

Medications will need to be taken until the Mantoux test is negative.

The client's family will also need to take medications to prevent infection.

Medications will need to be taken for the rest of the client's life, even if the client feels better.