Yes, you can buy Hydrocodone online with quick FedEx delivery. It would be great to choose the best site for buying Hydrocodone online. Hydrocodone is an opioid drug, a common pain reliever that is designed to address moderate and strong pain but also exposes a patient to addiction. Usually used with acetaminophen to create relief, hydrocodone requires a patient to take their prescribed dosage over time and be open with their healthcare providers about use.