The purpose of an antihistamine is to work against the effects of histamine, a chemical substance found in nearly all body tissues. Histamine is released in response to injury or invasion by foreign substances such as pollens (see allergy). It is also the irritating agent in certain insect venoms.
Metronidazole for a Strep B Infection. Group B Strep is a strain of the streptococcus bacteria that can cause serious illness and is potentially life threatening, especially in newborns, pregnant women, elderly patients, or anyone with any already compromised immune system.
1 They also do not cover anaerobes, Legionella or atypicals. 2  The G(+) coverage is poor, but they will cover S. aureus (MSSA only) and Listeria monocytogenes. 3  As volume of distribution increases (CHF, ascites, third spacing) the dosage of the drug must be increased. 4  There is no CSF penetration.