2. Treatments and corresponding abbreviations and classes.
| Treatment | Abbreviation | Class |
| Placebo | Pbo | NA |
| Azithromycin 250 mg once daily | AZM250 once daily | Macrolide |
| Azithromycin 250 mg once daily 3 times per week | AZM250 once daily (3x weekly) | Macrolide |
| Azithromycin 500 mg once daily 3 times per week | AZM500 once daily (3x weekly) | Macrolide |
| Azithromycin 500 mg once daily 3 times per month | AZM500 once daily (3x monthly) | Macrolide |
| Azithromycin 500 mg once daily (for first 3 days), azithromycin 250 mg every 2 days (intermittent) for rest of treatment duration |
AZM500 once daily (3 days) then AZM250 (alternating day days) |
Macrolide |
| Clarithromycin 500 mg once daily | CLR500 once daily | Macrolide |
| Erythromycin 250 mg three times daily | ERY250 three times daily | Macrolide |
| Erythromycin 250 mg twice daily | ERY250 twice daily | Macrolide |
| Erythromycin 125 mg 3 times daily | ERY125 three times daily | Macrolide |
| Erythromycin 200 to 400 mg once daily | ERY200/400 once daily | Macrolide |
| Roxithromycin 300 mg once daily | ROX300 once daily | Macrolide |
| Doxycycline 100 mg once daily | DOX100 once daily | Tetracycline |
| Roxithromycin 300 mg once daily + Doxycycline 100 mg once daily |
ROX300 once daily + DOX100 once daily |
Macrolide + tetracycline |
| Moxifloxacin 400 mg once daily (5 days every 4 weeks) |
MOX400 once daily (5 days every 4 weeks) |
Quinolone |
| Moxifloxacin 400 mg once daily (5 days every 8 weeks) |
MOX400 once daily (5 days every 8 weeks) |
Quinolone |
Abbreviations
AZM: azithromycin; CLR: clarithromycin; ERY: erythromycin; DOX: doxycycline; MOX: moxifloxacin; NA: not applicable; Pbo: placebo; ROX: roxithromycin.