answer:I’m thinking your probably take Amoxicillin Clauvanate? If so, patients and doctors tend to prescribe other drugs that don’t destroy the normal flora in the intestines and vagina as much. Also, amox clauv is minimum twice a day, Amox alone is three times a day, while other drugs are once a day. Amox and Amox Clauv also tends to be irritating to the stomach of many people. It also is a 7–10 day reigimen, while other drugs are 5. Patients are more compliant when a drug is easier to take for a shorter time period. In addition I would guess the new drugs are promoted more heavily by the pharm companies to doctors. Amoxicillin Clauvanate is my wonder drug for my GYN problems. The only drug that gives me magical relief. When I have a bacterial sinus infection I still take it, because it is so good for the rest of my body, but I request it.