GBS Perinatal Prophlaxis
<p>In women without penicillin allergy, <b>penicillin G</b> is the preferred drug for prophylaxis, given its low cost, low incidence of side effects, and high rate of GBS susceptibility. The Centers for Disease Control recommend a dose of <b>5 million units IV initially</b>, then <b>2.5 million units IV q 4 h until delivery</b>. 
 
<b>Ampicillin</b> <b>2g</b> initially, then <b>1g</b> q4h
 
<b>Cefazolin</b> <b>2g</b> initially, then <b>1g</b> q8h</p>