Methamphetamine can be smoked, injected intravenously, snorted, or ingested orally. The drug alters mood in different ways, depending on how it is taken. Immediately after smoking or intravenous injection, the user experiences an intense “rush” or “flash” that lasts only a few minutes and is described as extremely pleasurable. Smoking or injecting produces effects fastest - within 5 to 10 seconds. Snorting or ingesting orally produces euphoria - a high but not an intense rush. Snorting produces effects within 3 to 5 minutes, and ingesting orally produces effects within 15 to 20 minutes.