Medically reviewed by Mary Choy, PharmD Key Takeaways Nicotine has a half-life of about two hours and can stay in the blood for about one to three days. Cotinine, a byproduct of nicotine, has a ...

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 addiction remains one of the most persistent public health challenges worldwide, driven by changes in the brain that ...