Widely used as a primary treatment for tuberculosis, it effectively inhibits the growth of Mycobacterium tuberculosis. It is often combined with other antitubercular drugs to prevent resistance. It is also used prophylactically in high-risk individuals, such as close contacts of TB patients or those with weakened immune systems. Additionally, it is employed in veterinary medicine to treat tuberculosis in animals. Beyond medical applications, it serves as a reagent in organic synthesis for the preparation of various hydrazide derivatives. In research, it is utilized to study its mechanism of action and potential applications in other infectious diseases. However, its use should be under medical supervision due to potential severe side effects, such as liver inflammation or severe allergic reactions.