Fentanyl is a synthetic opioid that’s 50-100 times stronger than the pain reliever morphine. While some people use fentanyl on purpose, many others get it in their systems without their knowledge.

Medically reviewed by Anju Goel, MD Your ketone levels are measured by urinalysis.High ketone levels can be dangerous and may lead to ketoacidosis.Contact your healthcare provider if you experience ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. Fentanyl overdose deaths in Los Angeles ...