Effective drug for TB is 

Key Points

• Penicillin is an antibiotic that has been historically effective in treating a variety of bacterial infections.
• It works by inhibiting the synthesis of bacterial cell walls, which eventually leads to cell lysis and death.
• Penicillin is not commonly used for the treatment of tuberculosis (TB) because Mycobacterium tuberculosis, the bacteria responsible for TB, is inherently resistant to it.
• TB is typically treated with a combination of antibiotics, including isoniazid, rifampicin, ethambutol, and pyrazinamide, rather than Penicillin.
• Penicillin is more commonly used for infections caused by Gram-positive bacteria, such as streptococcal and staphylococcal infections.

Additional Information

• Azidothymidine (AZT) is an antiretroviral medication used to prevent and treat HIV/AIDS, not TB.
• Effective treatment for TB typically requires a prolonged course of multiple antibiotics to ensure all bacteria are eradicated and to prevent the development of drug-resistant strains.
• Regular monitoring and adherence to the prescribed treatment regimen are crucial for the successful treatment of TB and to prevent relapse or the spread of the disease.