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Drugs and Lactation Database (LactMed) [Internet]. Bethesda (MD): National Library of Medicine (US); 2006-.
CASRN: 218620-50-9
Drug Levels and Effects
Summary of Use during Lactation
Limited data indicate that pegvisomant is poorly excreted into breastmilk. Because pegvisomant is not orally absorbed, it is unlikely to adversely affect the breastfed infant.
Drug Levels
A woman was being treated during pregnancy for acromegaly with subcutaneous pegvisomant at a dosage that was progressively escalated from 15 mg to 25 mg daily during the course of pregnancy, and presumably postpartum. At an unreported time postpartum, pegvisomant was not detectable (<50 mcg/L) in breastmilk. The patient's breastmilk growth hormone concentration was 0.6 mcg/L compared to <0.1 mcg/L in 3 breastmilk samples from normal healthy mothers.[1]
Infant Levels. Relevant published information was not found as of the revision date.
Effects in Breastfed Infants
Relevant published information was not found as of the revision date.
Effects on Lactation and Breastmilk
Relevant published information was not found as of the revision date.
References
- 1.
- Brian SR, Bidlingmaier M, Wajnrajch MP et al. Treatment of acromegaly with pegvisomant during pregnancy: maternal and fetal effects. J Clin Endocrinol Metab. 2007;92:3374-7. [PubMed: 17595256]
Substance Identification
Substance Name
Pegvisomant
CAS Registry Number
218620-50-9
Drug Class
- Breast Feeding
- Human Growth Hormone Analogues and Derivatives
- Growth Hormone Receptor Antagonists
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