for your info they ARE specifically for acne vulgaris bacteria. My dad is a doctor and he has a drug book, and if you look under these names, it is listed to treat for acne. The reason why for this is because these drugs are antibiotics used to kill bacteria. Since they do not count acne as harmful to your health, these doses are very weak and basically used for acne. There are antibiotics out there that are A LOT stronger, for example something called suprax, this right now is the strongest drug out there. However, this is treated for life threatening situations. This drug could wipe out your acne within a week, but it also wipes out your good bacteria also. I dont just say stuff to screw with you guys, i'm in my first year of medical school and my family has a line of doctors.