That's right . It's important to take it as directed by your dr. But it's usually taken (twice a day )every 12 hrs or every 8hrs (three times a day). I've taken these before. And it's important that it's a full prescription and not left over pills that you saved or was given to you by a friend trying to be helpful.Because this medication has to be taken in its entirety,even if you're feeling better. Because if you stop taking it early and don't take it for the amount of days prescribed. The bacteria can become resistant to antibiotics and can double ( I remember the Dr telling me that). So if you don't have a complete prescription of these pills, or it wasn't prescribed to you. Then it's not a good idea to take them. I wish you good health.