Table 1.

Anti-tuberculosis drug classification, with inclusion of new compounds under evaluation ^a.

Group	Drug
Group 1: First-line oral agents	isoniazid; rifampicin; ethambutol; pyrazinamide
Group 2: Injectable agents	kanamycin; amikacin; capreomycin; streptomycin
Group 3: Fluoroquinolones	ofloxacin; levofloxacin; moxifloxacin; gatifloxacin
Group 4: Oral bacteriostatic second-line agents	p-aminosalicylic acid; cycloserine; terizidone; ethionamide; protionamide
Group 5: Agents with unclear efficacy	clofazimine; linezolid; amoxicillin; imipenem; clarithromycin; thioacetazone

^a According to Reference [6].