An opiate agonist, semi-artificial narcotic analgesic, and cough suppressant, hydrocodone is used to treat mild to moderate pain. Codeine, one of the alkaloids found in opium poppies, is used to make this medication. Indeed, according to the International Narcotics Control Board, the United States accounts for 99 percent of its intake. Schedule III has been changed to Schedule II by the management in response to the opioid crisis. Purchase hydrocodone online. Patients should give a documented prescription to the pharmacist at the time of purchase, as this method does not allow doctors to prescribe HCPs over the phone.