The most common type of opioid drug is Morphine. This drug is generally used in treating severe pain associated with cancer. Morphine is usually very fast-acting, especially when given in liquid form or through injection or intravenous route, in some cases bringing on almost instantaneous relief....

Drugs are consider "opioid drugs" when at least one of the ingredients was derived from the opium poppy (Papaver Somniferum). The opium poppy is just one of the many varieties of plants in the poppy family (Papaveraceae). The sap of the opium poppy is where the raw opium is stored.
This...