A completely different take on this phrase is that discretion means being discrete as in protecting people or information from exposure in some manner. If one is to be perceived as possessing valor by others, then they cannot express this by being merely brash and powerful.
Probiotics are essential (for at least a month or two after the antibiotics stop, depending on the potency) when you have had antibiotics to replenish the beneficial bacteria.
Antibiotics Are No Longer Necessary for All Patients with Joint Replacements Before Dental Work. Basically, the new guidelines (or lack of guidelines) mean that not all patients with artificial joint replacements need to get premedicated with antibiotics before invasive dental work. I think that this is a good thing. Many times dentists had to premedicate patients when there was hardly any risk at all of infection.