Crystal Methamphetamine is a chemical that has stimulant properties similar to adrenaline. It may be used through snorting, smoking or injection. While there are some users who will smoke amphetamine, this is not a common practice. Stimulants mimic the action of adrenaline and dopamine which increase heart rate, blood pressure, breathing rate, constrict blood vessels, dilate pupils, release sugar and fat into the blood stream and energize the brain. When the stimulation goes too high, it produces feelings of panic, paranoia, hallucinations, rage, seizures and stroke.
All addictive drugs have two things in common.
They produce an initial pleasurable effect, followed by a rebound unpleasant effect. An amphetamine, through its stimulant effects, produces a positive feeling, but when it wears off it leaves a person with the opposite feelings. This is because of the suppression by the drug of the normal production of adrenaline. Now, a chemical imbalance is created and the result is irritability that physically demands more of the drug to go back to normal and feel good again. This is a result of the drug's ability to suppress and deplete the brain's production of the normal chemical messenger on which the brain relies to generate positive feelings.