83 Analgesics and anti-inflammatory medications are commonly used by travelers. AZD8055 price Aspirin is polar, is acidic, penetrates into breast milk poorly, and is eliminated slowly. 84 Measurement of salicylate excretion by chromatography in nursing mothers showed that it was detectable in milk within 1 hour and peaked in 2–6 hours, suggesting that single doses of aspirin would not lead to clinically significant levels in milk, but repeated doses may be significant due to slow elimination. 85 Breastfed neonates
whose mothers take aspirin have been found to have substantial serum salicylate levels; concerns include metabolic acidosis, bleeding, effect on pulmonary circulation, and Reye syndrome. 74 A single dose of 450–650 mg delivers 0.1–21% to the infant over a 24-hour period. 86 AAP cautions the use of aspirin in breastfeeding Epacadostat mothers and recommends avoidance of large doses. 55 Ibuprofen is highly
protein bound, a weak acid, present in ionized form in greater proportion in plasma than in breast milk; no measurable concentration of ibuprofen was detected in the milk of breastfeeding women taking ibuprofen 400 mg every 6 hours. 87 Trace amounts of non-steroidal anti-inflammatory drugs (NSAIDs), which displace bilirubin and lead to increased risk of kernicterus, have been reported in milk. Therefore, NSAIDs are contraindicated in woman breastfeeding a jaundiced neonate. 74 Acetaminophen is an alternative analgesic. In contrast to aspirin, acetaminophen is hydrophilic and a relatively neutral/weak acid. Acetaminophen is rapidly absorbed and distributed to milk; assay by liquid chromatography showed it to be present in milk by 15 minutes after an oral dose, peak between 1 and 2 hours, with none detected after
12 hours. 86 Codeine is found in higher concentration in milk, being a weak base, highly lipophilic, and has low plasma protein binding. 84 Some travelers treat water with iodides and a very small amount is excreted in milk. 50 A nursing mother who used povidone–iodine vaginal gel for Tryptophan synthase 6 days (50 mg iodine) noted an iodine odor in her 71 2-month-old breastfed infant 2 days later. The infant’s serum and urine iodine levels were elevated. 88 Iodine was absorbed through vaginal mucosa, concentrated in breast milk, and reached a level in breast milk eight times that of serum. 88 Acquired hypothyroidism has been reported in full-term and pre-term breastfed infants whose mothers had topical exposure to iodine. 89,90 It appears prudent to avoid iodine preparations in breastfeeding travelers. Some travelers request sleep aids. Benzodiazepines are excreted in breast milk. 91 Zolpidem is an imidazopyridine derivative unrelated to benzodiazepine with hypnotic effect, rapid onset, short duration, and usually touted for no residual sleepiness. It has a rapid absorption and short half-life. Zolpidem is detected in breast milk 3 hours after a 20 mg dose at <0.02% of oral dose (milk/plasma ration of 0.13) primarily via passive diffusion.
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