Journal List > Korean J Perinatol > v.25(4) > 1013722

Cha: Antepartum Use of Antibiotics

Abstract

Antibiotics are among the most commonly prescribed medicines during pregnancies for various reasons. The antepartum use of antibiotics requires the consideration of maternal physiologic change, its effects to fetuses and drug-resistance. Usually, antibiotics are prescribed to pregnant women complicated with preterm labor, preterm premature ruptures of the membranes, urinary tract infection or sexually transmitted diseases. In this article, we reviewed the antepartum use of antibiotics in obstetrical management.

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Table 1.
Commonly used antibiotics during pregnancy
Beta-lactam
Penicillin
Natural Penicillin G, V
Aminopenicllin Ampicillin, amoxacillin
Peniciilin-beta lactamase inhibitor Ampicillin-sulbactam, amoxicillin-clavulanic acid
Cephalosporins
1st IV Cefazolin
2nd IV Cefuroxime, cefoxitin, cefotetan, cefmetazole
3rd IV Cefotaxime, ceftizoxime, ceftriaxone, ceftazidime, cefoperazone, Cefpirome, cefepime
4th IV Cephalexin, cephradine, cefadroxil
1st PO Cefaclor, cefuroxime, cefprozil, loracarbef
2nd PO Cefpodoxime, cefixime
3rd PO Gentamycin
Aminoglycoside Erythromycin, clarithromycin, azithromycin
Macrolide Clindamycin
Lincosamide Metronidazole
Nitromidazole

Abbreviation: IV, intravenous; PO, per oral.

Table 2.
Susceptibility of genital Mycoplasma to various antibiotics
Antibiotics M. hominis U. urealyticum M. genitalium
Tetracyclines
Tetracycline + + ND
Doxycycline + ++ ++
Macrolides
Erythromycin - ++ ++
Clarithromycin - ++ ++
Azythromycin - + +++
Lincosamides
Clindamycin +++ + +
Quinolones +
Ciprofolxacin + + +
Ofloxacin ++ + +
Moxifloxacin ++ ++ ++
Penicillins - - -

Abbreviation: ND, no data.

Extremely sensitive, +++; highly sensitive, ++, sensitive, +; weakly sensitive, +; insensitive, -.

Table 3.
Oral antimicrobial agents used for treatment o pregnant women with asymptomatic bacteriuria
Single-dose treatment
Amoxicillin, 3 g
Ampicillin, 2 g
Cephalosporin, 2 g
Nitrofurantoin 200 mg
Trimthoprim-sulfamethoxazole, 320/1600 mg
Three-day course
Amoxicillin 500 mg three times daily
Ampicillin 250 mg four times daily
Ciprofloxacin 250 mg twice daily
Levofloxacin 250 mg or 500 mg daily
Nitrofurantoin 50 to 100 mg four times daily or 100 mg twice daily
Trimthoprim-sulfamethoxazole 160/800 mg two times daily
Other
Nitrofurantoin, 100 mg four times daily for 10 days
Nitrofurantoin, 100 mg twice daily for 5 to 7 days
Nitrofurantoin, 100 mg at bedtime for 10 days
Treatment failures
Nitrofurantoin, 100 mg four times daily for 21 days
Suppression for bacterial persistence or recurrence
Nitrofurantoin, 100 mg at bedtime for pregnancy remainder
Table 4.
Classes of antiretroviral drugs
Drug class Category
Nucleoside/Nucleotide reverse transcriptase inhibitor
Lamivudine Preferred
Zidovudine Preferred
Abacavir Alternative
Emtricitabine Alternative
Tenofovir Alternative
Didanosine Special circumstances
Stavudine Special circumstances
Non-nucleoside reverse transcriptase inhibitor
Nevirapine Preferred
Efavirenz Special circumstances
Etravirine Insufficient data
Rilpivirine Insufficient data
Protease inhibitors
Ritonavir Preferred
Atazanavir Preferred
Lopinavir/ritonavir Preferred
Saquinavir Alternative
Darunavir Alternative
Indinavir Alternative
Nelfinavir Special circumstances
Fosamprenavir Special circumstances
Tipranavir Special circumstances
Entry inhibitors
Enfuvirtide Insufficient data
Maraviroc Insufficient data
Integrase inhibitors
Raltegravir Special circumstances
Table 5.
Recommended treatment for pregnant women with syphilis
Category Treatment
Early syphilis Benzathine penicillin G, 2.5 million units intramuscularly as a single injection- some recommend a second dose 1 week later
More than 1-year duration Benzathine penicillin G, 2.4 million units intramusculary weekly for three times
Neurosyphilis Aqueous crystalline penicillin G, 3-4 million units intravenously every 4 hours for 10-14 days
OR
Aqueous crystalline penicillin G, 3-4 million units intramusculary daily, plus probenecid 500 mg orally four times daily, both for 10-14 days
Table 6.
Treatment of Chlamydia trachomatis infection during pregnancy
Regimen Drug and Dosage
Recommended Azithromycin 1g orally in a single dose
Or
Amoxicillin 500 mg orally three times a
day for 7 days
Alternative Erythromycin base 500 mg orally four
times a day for 7 days
Or
Erythromycin base 250 mg orally four
times a day for 14 days
Or
Erythromycin ethylsuccinate 800 mg
orally four times a day for 7 days
Or
Erythromycin ethylsuccinate 400 mg
orally four times a day for 14 days
Table 7.
Treatment of Gonococcal infections during pregnancy
Regimen Drug and Dosage
Uncomplicated Ceftriaxone, 250 mg intramuscularly as a single dose
Plus
Azithromycin, 1 g orally as a single dose
Disseminated gonococcal infection Ceftriaxone 1 g IM or IV every 24 hours for 24 to 48 hours after improvement and oral cefixime 400 mg twice daily to complete at least 1 week of therapy
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