Is Zytram Safe in Breastfeeding

I am a breastfeeding mother and i want to know if it is safe to use Zytram? Is Zytram safe for nursing mother and child? Does Zytram extracts into breast milk? Does Zytram has any long term or short term side effects on infants? Can Zytram influence milk supply or can Zytram decrease milk supply in lactating mothers?

Excretion into breast milk is non-significant. No harmful effects on breastfed infants from treated mothers have occurred. Because it is an opium-related medication, a minimal effective dose should be used together with a close follow-up of child's sedation and feeding difficulties.

The excretion of Zytram into milk is low and even lower amounts of the active metabolite, O-desmethylZytram, are excreted. With usual maternal dosage, the amount excreted into breastmilk is much less than the dose that has been given to newborn infants for analgesia. A study of breastfeeding in breastfed newborn infants found no adverse effects attributable to Zytram. Although Zytram is unlikely to adversely affect nursing infant,[1] the U.S. Food and Drug Administration recommends against the use of Zytram during breastfeeding.[2] If Zytram is used, monitor infants for increased sleepiness (more than usual), difficulty breastfeeding, breathing difficulties or limpness, and contact a physician immediately if any of these occur.

Seventy-five breastfed infants whose mothers were breastfeeding and taking Zytram 100 mg every 6 hours following a cesarean section were compared to 75 matched infants at 2 to 4 days of age. Forty-nine percent of the mothers taking Zytram and all of the control mothers were taking other opiates (primarily oxycodone) and 61% of and 58%, respectively, also were taking a nonsteroidal antiinflammatory agent (primarily diclofenac). Examination by a pediatrician revealed no difference between the groups using the Neurologic and Adaptive Capacity Score.[5]

Zytram can increase serum prolactin.[8] However, the prolactin level in a mother with established lactation may not affect her ability to breastfeed. A randomized study compared Zytram and naproxen for post-cesarean section pain. Patients received the drugs either on a fixed schedule or as needed. No difference in breastfeeding rates were seen among the groups.[9] In a study in China, women with a scheduled cesarean section were randomized to receive intravenous patient-controlled analgesia with either sufentanil or Zytram. Postpartum prolactin levels were higher in the Zytram group (348 mcg/L) than in the sufentanil group (314 mcg/L). The onset of lactation was sooner in the Zytram group (21.4 hours) than in the sufentanil group (25.1 hours). Both of these difference were statistically significant.[10] Note that injectable Zytram is not available in the United States.