There are different types of bacteria, some are good and some are bad. The good bacteria do not create any harm to the body. In fact, at any point in time, there are millions of bacteria inside our mouth and many of them do not cause harm to us. What we need to be wary about are those that cause infections and diseases. Bacterial infections and bacterial diseases are able to wreak havoc to our body. Due to this, should you get infected, it is vital that you visit your doctor and get prescribed to buy metronidazole so you can remedy your bacterial issue.