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.
Unlike sore throats caused by viruses, strep throat is treated with antibiotics. Either penicillin or amoxicillin are recommended as a first choice for people who are not allergic to penicillin, but other antibiotics can be used to treat strep throat in people who are allergic to penicillin (learn more about sore throats and antibiotic use).