10,000 mcg are in 10 mg. For instance, a Duragesic Fentanyl 100 mcg patch contains 10 mg of Fentanyl. The patch is designed to release 100 mcg of fentanyl per hour into the bloodstream transdermally for 72 hours, but contains an extra 2,800 mcg.
How Many Mcg Are In 10 Mg?