Can you take levofloxacin while breastfeeding?

What LactMed would consider instead

LactMed ends this record by naming the drugs it would consider in place of levofloxacin. Whether any of them fits depends on what you are treating — this is the database’s list, not a recommendation from us.

• Ciprofloxacin
• Ofloxacin

How much levofloxacin gets into breastmilk

Maternal Levels. One woman was given levofloxacin 500 mg daily intravenously for 9 days, then orally for 17 days. Twenty-six breastmilk samples were obtained, beginning on day 10 of therapy and continued for 6 days after the discontinuation of therapy. A pharmacokinetic model that was developed predicted that a peak milk level of 8.2 mg/L would occur 5 hours after the dose. The milk levels fell with an estimated half-life of 7 hours. Traces of levofloxacin were still detectable in breastmilk 65 hours after the dose. The authors calculated that an exclusively breastfed infant whose mother was taking 500 mg daily would receive 1.25 mg daily in breastmilk, which is far below the dose of levofloxacin used in children.

Two nursing mothers each took one 500 mg capsule of levofloxacin (Tavanic-Sanofi, Istanbul) orally. Eleven complete collections of breastmilk were taken over the following 24 hours. Peak levofloxacin milk levels of 265 and 258 mcg/L occurred at 2.5 and 3 hours, respectively, in the two mothers. Average milk levels were 101 and 105, mcg/L, respectively. The half-lives in milk were 4.95 and 5.33 hours, respectively. Using the average milk levels, a fully breastfed infant would receive an average of 15.5 mcg/kg daily.

Five women with atypical pneumonia were receiving intravenous levofloxacin 400 mg once daily. Milk samples were collected at 0.5, 1, 2, 4, 6, 8, 10, 12, and 24 hours after the last dose of the drug. The peak milk level averaged 14.6 mg/L and occurred at 0.5 hours after the dose. The half-life in milk averaged 4.57 hours. The daily infant dosage was 0.4 mcg/kg for exclusively breastfed infants, which is less than 10% of the recommended therapeutic dose for 0 to 12-month-old infants (10 mg/kg once daily). This translated into an average relative infant dose of 6.1%. The authors recommended waiting for 1 hour or longer after a dose to resume breastfeeding after a dose to reduce the infant exposure. Five other women who collected milk samples unsupervised at unclear times had a calculated average RID of 8.2%.

Using the pooled results from two clinical trials, 98 breastmilk samples were collected from 20 women pre-dose, and at 2, 4, 6 and 8 hours after the dose at 5 to 12 weeks postpartum and after 4 or more weeks of levofloxacin therapy initiated during pregnancy for rifampicin-resistant tuberculosis . Some opportunistic samples were also obtained 6 to 12 months postpartum. A population pharmacokinetic model was built using NONMEM. The model showed rapid equilibration between maternal plasma and milk, with a half-life of 7.5 minutes. The median peak milk concentration was 16.9 mg/L. The estimated daily amount of levofloxacin excreted into breastmilk ranged from 3.82 to 10.8 mg, which resulted in an RID of about 6%.

Infant Levels. Thirteen breastfed (6 exclusive, 7 mixed) infants with a median age of 6.97 weeks had serum samples (15 total) taken while their mothers were receiving levofloxacin 750 or 1000 mg daily. Eighty percent of the concentrations were above the level of quantification, with most below 1 mg/L. The highest was about 4 mg/L and another was about 2.5 mg/L.

What has been seen in breastfed infants

Relevant published information was not found as of the revision date.

Effects on milk supply

Relevant published information was not found as of the revision date.