IBCLC Practice Exam 2026 – Complete Preparation Guide

Illicit drug use is considered a contraindication for breastfeeding due to the significant and harmful effects these substances can have on both the breastfeeding parent and the infant. Illicit drugs can enter breast milk, and their presence can pose serious health risks to a nursing child, including developmental issues, withdrawal symptoms, and other potential long-term consequences.

In contrast, the other options may carry risks that require careful consideration but do not automatically rule out breastfeeding in all situations. For example, alcohol can be consumed in moderation while breastfeeding, and many prescription medications and over-the-counter medications have guidelines that allow their use during lactation, often with caution and under the guidance of a healthcare professional.

Because illicit drugs have unpredictable effects and their use can lead to significant impairment in the ability to safely care for an infant, as well as the potential for serious health outcomes, they are specifically identified as a contraindication for breastfeeding. This underscores the importance of protecting maternal and infant health through informed choices about substance use.