Heroin
Heroin is increasingly found laced with fentanyl, a more powerful, synthetic opioid.
Short-term effects of heroin
How quickly heroin affects you depends on how you take it.
When you inject heroin into a vein, it reaches your brain and produces a rush of well-being (euphoria) within seconds. The effects last anywhere from 45 seconds to a few minutes.
Smoking or snorting produce effects just as quickly, but they are less intense.
When you inject heroin into a muscle or under the skin the effects occur more slowly, usually within 20 minutes.
After the quick ‘rush’ of well-being a period of calm follows. This may last up to about an hour. Other short-term effects may last for about 3 to 5 hours.
To avoid symptoms of withdrawal, people who use heroin may feel the need to use it every 6 to 12 hours.
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Doctors use ketamine to induce general anesthesia alone or with other general anesthetics, such as nitrous oxide. They use it in the emergency department setting to produce short-term sedation whenTrusted Source:
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Treating pain
Practitioners use low doses that do not produce dissociation to relieve severe pain from the followingTrusted Source conditions:
- trauma
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