How do amphetamines make you feel?
How amphetamines make you feel depends on:
- how much you use
- how often and how long you use them
- how you use them (by injection, orally, etc.)
- your mood, expectation and environment
- your age
- whether you have certain pre-existing medical or psychiatric conditions
- whether you’ve taken any alcohol or other drugs (illicit, prescription, over-the-counter or herbal).
When amphetamines are injected or smoked, they reach the brain quickly, and produce a “rush,” or surge of euphoria, immediately.
The effects of amphetamines are often different from person to person.
Amphetamines can make people:
- alert, confident and energetic
- talkative, restless and excited
- feel a sense of power and superiority
- tense and nervous
- hostile and aggressive.
In children who are hyperactive, however, amphetamines and related drugs, in the correct doses, can have a calming effect.
Amphetamines reduce hunger and increase breathing, heart rate and blood pressure. Larger doses may cause fever, sweating, headache, nausea, blurred vision, very fast or irregular heartbeat, tremors, loss of co-ordination and collapse.
How long does the feeling last?
The initial rush after injecting or smoking lasts only a minute. With some types of amphetamines, the stimulant effects can last up to 12 hours. Some people may use amphetamines repeatedly over a period of several days to try to stay high.
Are amphetamines dangerous?
- Overdose can cause seizures, coma and death due to burst blood vessels in the brain, heart failure or very high fever.
- Amphetamines are linked to risky and violent behaviours, and increased injury and sexually transmitted disease.
- Amphetamines may cause bizarre or repetitive behaviour, paranoia and hallucinations.
- Injecting any drug can cause infections from used needles or impurities in the drug; sharing needles with others can transmit hepatitis or HIV.
Are amphetamines addictive?
When taken as prescribed, amphetamines and related drugs do not cause addiction. However, these drugs can cause addiction if they are misused. Methylphenidate is less likely to cause addiction than other amphetamines.
Regular non-medical use of amphetamines can lead to tolerance. This means that the person needs to take more and more of the drug to get the desired effect. Regular use of amphetamines, especially when the drug is smoked or injected, can quickly cause addiction.
Addiction means that cravings and compulsive use of the drug become very important to a person. If drug use is stopped, the person usually goes through withdrawal, also called “the crash.” Symptoms of withdrawal can include fatigue, restless sleep, irritability, intense hunger, depression, suicidal behaviour and fits of violence.
People who use amphetamines often also use other drugs, such as alcohol, cannabis or benzodiazepines, to help them relax and sleep. This increases the risk for dependence on these other drugs.
What are the long-term effects of taking amphetamines?
Chronic use of amphetamines can lead to serious physical and mental health problems. Because amphetamines reduce appetite and fatigue, they can cause vitamin and sleep deficiencies and malnutrition, and make people more prone to illness.
Regular use of amphetamines can also cause amphetamine psychosis. Symptoms include hallucinations, delusions, paranoia, and bizarre and violent behaviour. These symptoms usually disappear a few days or weeks after the drug use has stopped.
Longer-term studies support the efficacy and safety of methylphenidate when taken as prescribed to treat hyperactivity, but more information is needed to evaluate its long-term effects.
Copyright © 2004, 2012 Centre for Addiction and Mental Health