Hydrocodone is an opioid pain medication. People can buy Hydrocodone online for the treatment of severe pain. Doctors only prescribe this medicine for pain of prolonged duration only when the therapy from other non-opioids remains ineffective. This medicine is also available under the name of Hysingla, among others. Due to being an opioid, this drug comes under the classification of schedule II controlled substance, which means you will need a prescription to buy this drug. This medicine can be habit-forming, so avoid using it for an extended period. You should follow your doctor’s prescription to decrease the risk of adverse effects.