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.
How long does prednisone side effects last for 40mg taken for 3 days. Also had cortisone shot two days before st more How long does prednisone side effects last for 40mg taken for 3 days. I have been on 40mg prednisone, then 35mg, and now 20mg since October 6. Weight gain is affecting my self-esteem.