Fentanyl

No. Directly touching or being around fentanyl will not lead to an overdose. It must be introduced into the bloodstream or a mucus membrane in order for it to work. 

Fentanyl on your skin takes about 48 to 72 hours to absorb if not cleaned off, unless it goes through an open wound.

Even though fentanyl won't lead to an overdose, avoid direct contact with any suspicious substances. 

 Fentanyl in powdered form needs to be disturbed in order to get into the air and potentially be inhaled. If you're unable to distance yourself or are worried about disturbing it, use a wet cloth/paper towel to cover it.

If you accidentally touch fentanyl, wash your hands as soon as you can with soap and water, and avoid touching your face. Avoid using hot water and alcoholic hand sanitizers and soaps, as that can increase absorption into the skin.

If you believe you or someone got fentanyl into their system, monitor for symptoms of fentanyl use and overdose and administer Naloxone if necessary.