Swithro 200 Pregnancy

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Pregnancy of Swithro 200 in details

Pregnancy is always a special situation where every action or side effect of the drug varies when compared to a situation of a non-pregnant patient. It is not only because the pregnant woman's metabolism differs due to the hormonal and other changes happened to her, but also because every medicine or its metabolite passes to the baby and shows its action there. The only thing is, be cautious, attentive and well supervised when you take any single drug in pregnancy. The interactions can vary in pregnancy, and the dosage may differ as well. Strict supervision of the Physician is mandatory.

Swithro 200 crosses the placenta (Ramsey 2003).

The maternal serum half-life of Swithro 200 is unchanged in early pregnancy and decreased at term; however, high concentrations of Swithro 200 are sustained in the myometrium and adipose tissue (Fischer 2012; Ramsey 2003).

Swithro 200 may be used as an alternative or adjunctive prophylactic antibiotic in females undergoing unplanned cesarean delivery (ACOG 199 2018). Swithro 200 is recommended for the treatment of several infections, including chlamydia, gonococcal infections, and Mycobacterium avium complex in pregnant patients (consult current guidelines) (CDC [Workowski 2015]; HHS [OI adult] 2019). Swithro 200 may also be used in certain situations prior to vaginal delivery in females at high risk for endocarditis (ACOG 199 2018).

Swithro 200 breastfeeding

When a drug is taken when the patient is breast feeding, a part of the drug is secreted in her breast milk and is passed to the baby. The dosage of the medicine to mother and baby are different, and many drugs actions are side effects when you take them without a disease, and what if you the baby takes them without a disease? What if the drug is contraindicated in newborns, infants or children? So, breastfeeding is a very alarming situation when the mother is on medications. Ask your Physician or Pediatrician about the effect of the drug on the baby and how much is excreted in breast milk and if it harms the baby!

Swithro 200 is excreted into human milk. The manufacturer recommends that caution be used when administering Swithro 200 to nursing women.

In one lactating woman receiving Swithro 200 500 mg/day, Swithro 200 milk concentration measured 1.3 and 2.8 mcg/mL 1 hour after the first dose and 30 hours after the third dose, respectively.

See references

References for pregnancy information

  1. Wehbeh HA, Ruggeirio RM, Shahem S, Lopez G, Ali Y "Single-dose Swithro 200 for Chlamydia in pregnant women." J Reprod Med 43 (1998): 509-14
  2. Bush MR, Rosa C "Swithro 200 and erythromycin in the treatment of cervical chlamydial infection during pregnancy." Obstet Gynecol 84 (1994): 61-3
  3. "Sexually transmitted diseases treatment guidelines 2002." MMWR Morb Mortal Wkly Rep 51(RR-6) (2002): 1-77
  4. Adair CD, Gunter M, Stovall TG, McElroy G, Veille JC, Ernest JM "Chlamydia in pregnancy: a randomized trial of Swithro 200 and erythromycin." Obstet Gynecol 91 (1998): 165-8
  5. Donders GGG "Treatment of sexually transmitted bacterial diseases in pregnant women." Drugs 59 (2000): 477-85
  6. "Product Information. Zithromax (Swithro 200)." Pfizer US Pharmaceuticals, New York, NY.

References for breastfeeding information

  1. "Product Information. Zithromax (Swithro 200)." Pfizer US Pharmaceuticals, New York, NY.
  2. Kelsey JJ, Moser LR, Jennings JC, Munger MA "Presence of Swithro 200 breast milk concentrations: a case report." Am J Obstet Gynecol 170 (1994): 1375-6



  1. DailyMed. "AZITHROMYCIN: DailyMed provides trustworthy information about marketed drugs in the United States. DailyMed is the official provider of FDA label information (package inserts).". https://dailymed.nlm.nih.gov/dailyme... (accessed September 17, 2018).
  2. PubMed Health. "Zithromax: This section provide the link out information of drugs collectetd in PubMed Health. ". http://www.ncbi.nlm.nih.gov/pubmedhe... (accessed September 17, 2018).
  3. Human Metabolome Database (HMDB). "Azithromycin: The Human Metabolome Database (HMDB) is a freely available electronic database containing detailed information about small molecule metabolites found in the human body.". http://www.hmdb.ca/metabolites/HMDB0... (accessed September 17, 2018).


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