Heroin is a highly addictive drug that comes in the form of a dark, sticky substance (black tar heroin) or a white or brownish powder.
Heroin is most often used by:
Here you’ll find more information about the acute (short-term) side effects of heroin, dangers of heroin use, and how to find addiction treatment for yourself or a loved one.
Short-Term Effects On The Brain
Once heroin enters the brain, it is converted to the natural opiate morphine, from which it’s derived.
From here, it binds to the body’s mu-opioid receptors, which are responsible for regulating mood, hormones, body movement, and sensation of pain.
When used, heroin can cause:
- sense of well-being
- mental fogginess
- reduced anxiety
Heroin use can trigger a release of the “feel-good” chemical dopamine. This chemical is associated with positive mood, pleasure, motivation, and the brain’s reward system.
Short-Term Effects On The Body
The mental and psychological effects of heroin may be accompanied by a range of physical effects, due to the ways that heroin affects the central nervous system.
Physical side effects and signs of heroin use can include:
- dry mouth
- reduced pain
- warm flushing of the skin
- severe itching
- constricted pupils (tiny pupil size)
- heaviness of the arms and legs
People who use heroin may drift between a fully alert and semi-conscious state—a phenomenon sometimes referred to as “nodding out”.
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Although the initial rush of heroin can begin to go away within minutes, some side effects of heroin—such as drowsiness and mental fog—may last for up to three to five hours.
Short Term Effects By Method Of Use
In addition to the effects of heroin itself, the drug can also cause specific effects according to the way it’s used.
Short-term side effects by method of use:
- injection: track marks, bruising near injection site, collapsed veins, clogged blood vessels
- snorting: nosebleeds, red nose, runny nose, sniffling, damaged nasal tissue, changed sense of smell
- smoking: hacking cough, worsened asthma, respiratory distress, burned or cracked lips
Understanding these signs of heroin use, in addition to the effects of the drug, can be useful for identifying heroin use in others.
How Long Does It Take To Feel The Effects Of Heroin Use?
Heroin is known for its ability to cause rapid effects, also known as a “rush” within anywhere from seconds to minutes, depending on whether it’s injected, snorted, or smoked.
Injecting and smoking heroin are the fastest ways to feel its effects.
Snorting heroin can cause relatively quick effects, but is not always associated with the same “rush” that can come from injection.
Does Everyone React To Heroin The Same Way?
The short answer is: no. Various personal and biological factors can affect how drugs affect people.
These factors can include co-occurring mental health conditions, body composition, and having a previous history of drug abuse.
People who have a low tolerance for heroin, or have a slow metabolism, may have stronger reactions to small doses of heroin. In addition, the actual ingredients in heroin that is bought and sold on the street can greatly vary.
Street forms of heroin can be mixed with a wide variety of additives, fillers, and even other drugs—all of which can influence the effects of heroin and potential dangers.
What Are The Risks Of Short-Term Heroin Use?
Heroin carries the risk of several acute dangers, including legal consequences, effects on mental health, and physical dangers.
Primary risks associated with heroin use include:
- infectious diseases through injection (e.g. HIV/AIDS, hepatitis)
- increased tolerance
- arrest/drug charges
- brain damage
Heroin is a drug that is both illegal and dangerous. According to the Centers for Disease Control and Prevention (CDC), nearly 15,000 people died of an overdose involving heroin in 2019. This is a rate of almost 5 deaths per 100,000 residents.
According to data from the FBI, about one-quarter of the 1.65 million drug arrests made in 2018 involved the possession, sale, or manufacturing of heroin, cocaine, and related derivatives.
Getting arrested for drug-related charges can have devastating effects on your ability to get a job, keep a job, and secure or maintain housing. It can also lead to jail or prison time.
Finding Treatment For Heroin Abuse And Addiction
If you or someone you know is using heroin, it’s never too early to ask for help. Heroin can be very dangerous and have long-term effects, whether used once or a hundred times.
Treatment for heroin use generally involves:
- medically supervised detox
- medications for opioid use disorder (e.g. methadone, buprenorphine/naltrexone)
- behavioral therapy
Medication-assisted treatment—a combination of behavioral therapy with opioid use disorder medications—is the most effective treatment for heroin addiction, but isn’t offered by all treatment providers.
Recovery is possible. For more information on how to find heroin addiction treatment near you, call our helpline today.
Addiction Resource aims to provide only the most current, accurate information in regards to addiction and addiction treatment, which means we only reference the most credible sources available.
These include peer-reviewed journals, government entities and academic institutions, and leaders in addiction healthcare and advocacy. Learn more about how we safeguard our content by viewing our editorial policy.
- Centers for Disease Control and Prevention (CDC)—Heroin Overdose Data
- U.S. Federal Bureau of Investigations (FBI)—Estimated Number of Arrests United States 2018
- U.S. National Institute on Drug Abuse (NIDA)—Heroin Research Report
- U.S. National Institute on Drug Abuse (NIDA)—Heroin DrugFacts