Last checked for clinical accuracy on 14 April 2025. This article is general information and is not a substitute for advice about your own situation.
Heroin withdrawal can be fatal, although documented deaths have occurred mainly in settings such as jails where medical supervision falls by the wayside. Withdrawal affects the central nervous system and can disrupt vital functions including breathing and heart rate, while vomiting and diarrhoea can lead to dehydration, elevated sodium levels and eventual heart failure. Symptoms usually begin 8 to 12 hours after the last dose, and supervised detox is the safer route.
Before you go further, a safety note
Opioid tolerance falls quickly after any break in use, which is what makes returning to a previous dose so dangerous. Never use alone. If you think someone may have overdosed, call 999 in the UK or 112 anywhere in Europe straight away and stay with them until help arrives.
If you are dependent on opioids, speak to a doctor before changing or stopping anything.
Using heroin can have profound effects on a person's body and overall well-being. This highly addictive drug can hook those who try it in a short period. Those who would like to quit will likely go through withdrawal, which may result in adverse side effects that require medical help.
Are There Fatalities Caused By Heroin Withdrawal?
Yes, fatalities can occur from heroin withdrawal. While typically known to have unpleasant side effects, fatalities from the withdrawal process have been documented primarily in environments such as jails, where medical supervision can fall by the wayside. And while withdrawal from heroin isn't as dangerous as quitting other opiates such as fentanyl, it can still result in serious complications or, in certain situations, death. Heroin is a type of opioid, and any opiate withdrawal will affect the central nervous system. As such, this may disrupt vital bodily functions, such as breathing and heart rate. In addition, withdrawals can cause severe side effects that relate to dehydration, elevated sodium levels, and eventual heart failure.
Why Does Heroin Withdrawal Happen?
Heroin withdrawal happens because those addicted or dependent on opioids like heroin need the drug to keep their bodies functioning. Without the drug in the system, they have a difficult time doing daily activities since their bodies undergo significant physiological changes. A person who continuously abuses heroin will slowly develop a tolerance to the substance. Over time, the body adapts to the presence of the drug, and withdrawal symptoms may occur if heroin use is stopped or significantly reduced.
Withdrawal Symptoms from Heroin Addiction
Withdrawal symptoms typically start around 8 to 12 hours after the last dose. Some heroin withdrawal symptoms may include:
- Agitation and severe mood swings as the body adjusts to the drug's absence.
- Difficulty sleeping and insomnia because of the discomfort from quitting the drug.
- Depression and overall feeling of hopelessness since the brain doesn't have heroin to function normally.
- Muscle aches and cramps from experiencing a sudden lack of opioids in the body.
- Vomiting and diarrhoea, which can result in dehydration if unmanaged.
- Strong cravings for the drug typically peak around 24 hours after last using heroin.
- In extreme cases, heroin withdrawal may also cause rapid heart rate and seizures. These withdrawal symptoms are why it's important to receive personalised care. These symptoms can worsen if those attempting to detox from heroin do so without proper medical supervision.
Medical Detox for Heroin Addiction
The best way to manage heroin withdrawal and addiction is to go through a medical detox. Since opioid withdrawal can become life-threatening, a medical detox is necessary to handle complications that may arise during this time. During medical detox, clients will have round-the-clock supervision from healthcare professionals. This ensures that those going through withdrawal receive immediate medical attention so they can manage their withdrawal symptoms.
How Long Does Heroin Detox Take?
Heroin detox will look different for everyone. While the typical timeline for heroin detox is around a week, the actual timeline will vary based on different factors. For instance, those who have used heroin for a longer time may require a longer time to detox from the drug. The higher concentration of heroin in their system will require a longer processing time. Those with health complications that could occur and will need to be attended to during the detox process may also have a more difficult time eliminating the drug from their system. This can result in prolonging the usual timeline.
Can I Detox on My Own?
No, detoxing on your own is never recommended. Heroin withdrawal can cause serious psychological effects. This is when people need the most empathetic care for their emotional and mental well-being. Being alone is dangerous in case of a medical emergency. Detoxing on one's own will not provide the specialised care that is important during withdrawal. The absence of medical supervision also means limited access to medications. In some cases, medications such as naltrexone and buprenorphine are used to manage withdrawal symptoms. It can be difficult to access these medications without medical supervision when needed.
Is someone you love using heroin?
Families are usually the first to see it and the last to be asked. Talk to a clinician about what you are seeing, in confidence and with no obligation.
Other Signs of Heroin Addiction
Some other signs of addiction include:
- Track marks, constricted pupils, and weight loss, all of which are physical symptoms that someone is using heroin.
- Sudden changes in behaviour, such as increased secrecy, sudden changes in mood, and unusual sleep patterns.
- Isolating from friends and family to continue using.
- Going into financial problems as a person continues to purchase heroin to support the addiction.
- Engaging in risky behaviours, such as unsafe sexual practices or driving under the influence of the drug.
Rehab for Heroin Addiction
Treatment typically involves rehab, which is when patients receive comprehensive care to address the addiction at hand. During this time, patients go through intensive therapies so they can learn more about the root cause of their addiction. Working with a therapist also helps patients develop healthy coping mechanisms to manage further symptoms and prevent relapse.
The Risk of Relapse and Overdose
Any addiction comes with a high risk of relapse. While detox can address the problem of addiction, it's not enough to guarantee that a person will stay sober forever. This is why it's important to receive professional treatment and aftercare for addiction. Professional help digs deeper and uncovers the underlying aspects of addiction for long-term recovery. Then, the aftercare programme provides ongoing support to help clients manage struggles after rehab. In addition, many studies show that overdose deaths shortly occur after being released from treatment. Proper aftercare and ongoing support can prevent this from happening.
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Treatment for Heroin Addiction at Sierra Recovery
Heroin addiction should never be taken lightly, especially since those trying to quit will experience different withdrawal symptoms. At Sierra Recovery, we take the time to understand each person's unique situation so that we can tailor your treatment programme accordingly. Our team has years of experience in providing addiction treatment for clients struggling with heroin use and other substances. If you feel you are ready to take the step forward in addressing your addiction, we are here to help. Get professional help today
Last reviewed 2026-07-25. Next review 2027-07-25.
Questions people actually ask
When do heroin withdrawal symptoms start?
Symptoms typically begin around 8 to 12 hours after the last dose, and cravings usually peak at around 24 hours. Common effects include agitation and severe mood swings, insomnia, low mood and hopelessness, muscle aches and cramps, and vomiting and diarrhoea that can cause dehydration if left unmanaged. In extreme cases withdrawal may also cause a rapid heart rate and seizures.
How long does heroin detox take?
Detox looks different for everyone. The typical timeline is around a week, but the actual length varies. People who have used heroin for a longer period may need more time, because the higher concentration in their system takes longer to process. Health complications that need attending to during detox can also prolong the usual timeline.
Can I detox from heroin on my own?
Detoxing on your own is not recommended. Withdrawal can cause serious psychological effects at exactly the point when empathetic care matters most, and being alone is dangerous if a medical emergency happens. It also means limited access to medications such as naltrexone and buprenorphine, which are sometimes used to manage withdrawal symptoms. Speak to a doctor before changing or stopping anything.
Why is relapse after detox so dangerous?
Opioid tolerance falls quickly after any break in use, which is what makes returning to a previous dose so dangerous. Many studies show that overdose deaths often occur shortly after release from treatment, so proper aftercare and ongoing support matter. Never use alone. If you think someone may have overdosed, call 999 in the UK or 112 anywhere in Europe straight away.
What are other signs of heroin addiction?
Physical signs can include track marks, constricted pupils and weight loss. Behaviour often changes too, with increased secrecy, sudden shifts in mood and unusual sleep patterns. People may isolate themselves from friends and family in order to keep using, run into financial problems from buying the drug, and take risks such as unsafe sexual practices or driving while under the influence.
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