Medically Reviewed Article from Healthline by Kristeen Moore and Diana K. Wells
From the article:
"Hydrocodone and oxycodone are powerful drugs that doctors only prescribe when they are needed. The ingredients in these drugs are habit-forming, and some people may become addicted to them. People who become addicted often build up a tolerance to the drug. This means they will need to take larger amounts in order to feel its effects. This type of behavior can often lead to an overdose."
This article discusses the risk factors and causes of overdose of common prescription pain medications.