Help save our bats: Due to the spread of White-Nose Syndrome, a deadly disease affecting hibernating bats, visitors are asked to clean their gear before entering Carlsbad Caverns National Park.
Best Answer: Prednisone has a half-life of roughly 1 to 1.5 days. This means that after 4-6 days, levels of the drug drop below natural levels of cortisol, so it no longer has an effect. There's no way to predict the chances that your blood test results are caused by prednisone-you have to wait and see what happens.
If you are subject to a nicotine drug test, it will likely assess for the presence of cotinine (rather than nicotine). For most nicotine users, cotinine could remain in your system for a period of 2.29 to 6.18 days.