What is the primary use of para-amino salicylate sodium (PAS)?

Para-amino salicylate sodium (PAS) is primarily used as an anti-tuberculosis medication. It acts as a second-line agent in the treatment of tuberculosis, particularly when the tuberculosis bacterium exhibits resistance to first-line medications. PAS works by inhibiting the growth of the bacteria responsible for tuberculosis, ultimately helping to control and eradicate the infection. Its effectiveness is attributed to its ability to interfere with essential bacterial metabolic processes.

The other options, although they represent important drug categories, do not pertain to the action of PAS. Antidepressants are used to treat mood disorders, anti-inflammatory medications address inflammation and related pain, and antihypertensives are utilized to manage high blood pressure. Understanding the specific role of PAS in the management of tuberculosis is crucial for recognizing its clinical applications and the context in which it is prescribed.