A client with pulmonary tuberculosis is prescribed Rifampin, Isoniazid INH, Pyrazinamide Tebrazid, and Ethambutol Myambutol. The nurse should include in teaching that:

• A. The combination of drugs prescribed is necessary to decrease the risk of drug resistance
• B. Each drug can be stopped once symptoms improve
• C. Only one drug is needed for treatment success
• D. The regimen is short-term and requires minimal adherence

Answer: (A)

The main idea here is that treating tuberculosis requires using multiple drugs at the same time to prevent the bacteria from developing resistance. Mycobacterium tuberculosis can adapt if exposed to just one drug, so combining several medications with different mechanisms makes it much harder for any surviving bacilli to resist all of them. This is why the standard initial approach uses a four-drug regimen together during the intensive phase—to rapidly reduce the bacterial load and minimize the chance of resistance taking hold.

Stopping treatment early or relying on a single drug would allow resistant strains to emerge, which can prolong illness, increase transmission, and complicate future treatment. TB therapy is intentionally lengthy and requires good adherence to ensure complete eradication of the infection. Additional context that helps with teaching includes being aware of potential drug-specific side effects—such as liver toxicity with some agents and other noticeable effects—so patients understand the importance of completing the full course and reporting adverse effects promptly.

So, the best teaching point is that the combination of drugs is essential to decrease the risk of drug resistance.