Nicotine's effects (and how long they last) depend on many variables Medically reviewed by Armeen Poor, MD Nicotine stays in your body for different amounts of time depending on the type of test.

Nicotine can be present in breast milk for a few hours after smoking or vaping. There are steps you can take to reduce your baby’s exposure to nicotine in breast milk. Nursing can provide many ...

Nicotine can pass from a person’s lungs into breast milk. Nicotine levels in breast milk are highest during and immediately after smoking and tend to drop by about half in around 95 minutes. Avoiding ...