The normal method of drug ingestion was smoking, snorting and swallowed.
And then in the 1990s the the potent heroin directly injected into veins. This "opioid drug" is created by mixing morphine, a natural substance found in the seedpod of Asian poppies, with water and injecting the mixture.
The method by which a drug enters the bloodstream is called the absorption. The two most popular methods of administration are intravenous and oral, though there are numerous other options. When a medication is given intravenously, the absorption phase is skipped and the drug enters circulation right away, increasing the drug's effects.
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