Opioid addiction can involve heroin, opium or prescription pain medicines, but the risks are not identical in every case. Families consulting a drug rehabilitation centre in Mumbai should expect the assessment to distinguish opioid use, physical dependence, withdrawal, overdose risk and opioid use disorder rather than treating every case as the same addiction. Some opioids act quickly and produce marked drowsiness, while others remain active for longer or are taken as legitimate medical treatment before physical dependence develops. The most serious danger is overdose caused by slowed breathing.
Safe treatment begins by identifying the opioid, assessing withdrawal and overdose risk, and deciding whether evidence-based medication, counselling, rehabilitation or a combination of care is required.
A person may begin using an opioid for pain, relief from distress, sleep or intoxication. Over time, tolerance, withdrawal and cravings can make it increasingly difficult to stop. This does not mean that every patient prescribed an opioid has an addiction. Physical dependence, tolerance and opioid use disorder are related concepts, but they are not interchangeable.
This guide explains heroin addiction, opium addiction, pharmaceutical opioids, prescription painkiller dependence, withdrawal, overdose, assessment and long-term treatment.
What is opioid addiction?
Opioids are a group of natural, semi-synthetic and synthetic substances that interact with opioid receptors in the brain and body. They can reduce pain and produce sedation or euphoria, but they can also slow breathing.
The opioid group includes:
- Heroin
- Opium
- Morphine
- Codeine
- Tramadol
- Fentanyl
- Oxycodone and similar prescription pain medicines
- Methadone and buprenorphine, which may also be used medically to treat opioid dependence
The World Health Organization’s opioid overview explains that opioids include substances obtained from the poppy plant as well as semi-synthetic and synthetic compounds with similar effects.
Opioid addiction is commonly diagnosed clinically as opioid use disorder. It involves more than taking an opioid or experiencing withdrawal. The central problem is an impaired ability to control use despite harm or serious risk.
Opioid use in India
India’s national opioid pattern includes heroin, pharmaceutical opioids and opium. The official National Survey on Extent and Pattern of Substance Use in India, released in 2019 by the Ministry of Social Justice and Empowerment and NDDTC, AIIMS New Delhi, reported current opioid use among 2.06% of people aged 10–75.
The survey reported the following category-specific estimates:
- Heroin use: 1.14%
- Pharmaceutical opioid use: 0.96%
- Opium use: 0.52%
It also estimated that approximately 0.55% of Indians required help for harmful or dependent opioid use. Heroin had the highest reported prevalence of current use and dependence among the opioid categories studied.
India’s opioid-use prevalence was reported at the time as higher than the global estimate then in use. This should be understood as a comparison based on the 2018 survey period and contemporary international data, not as a new comparison with 2026 global prevalence.
The figures refer to current use and problem use, not to a diagnosis of opioid addiction in every person who reported taking an opioid.
Heroin, opium and pharmaceutical opioids are related but not identical
| Opioid category | Typical context | Possible effects | Major concerns |
|---|---|---|---|
| Heroin | Illicit opioid that may be injected, smoked or inhaled | Rapid euphoria, sedation, small pupils and slowed breathing | Overdose, uncertain purity, infections from injecting, strong dependence and reduced tolerance after abstinence |
| Opium | Naturally derived poppy product used in different traditional or non-medical forms | Relaxation, pain relief, drowsiness and constipation | Dependence, variable strength, prolonged use and transition to other opioids |
| Pharmaceutical opioids | Medicines prescribed for pain or obtained and used without coordinated medical care | Pain relief, sedation, euphoria or reduced alertness | Physical dependence, misuse, dangerous combinations, overdose and abrupt discontinuation |
The substance name alone does not establish severity. Dose, frequency, route, duration, other substances and the person’s medical condition all change the risk.
Heroin addiction
Heroin is a rapidly acting opioid. Its effects may include a brief period of euphoria followed by drowsiness, slowed movement and reduced alertness.
Possible heroin addiction symptoms include:
- Repeatedly becoming very sleepy or “nodding off”
- Small pupils while intoxicated
- Slowed speech and movement
- Constipation
- Frequent unexplained absences
- Increasing money problems
- Strong cravings
- Using frequently to avoid withdrawal
- Injection marks, skin infections or damaged veins when injected
- Continued use after overdose or serious harm
These signs may reflect recent heroin use, dependence or another medical problem. None can confirm heroin addiction by appearance alone.
Why heroin overdose can occur unexpectedly
The strength and contents of illicit heroin may be uncertain. A person may receive a stronger product than expected or combine it with alcohol, sleeping medicines or another sedative.
Overdose risk also increases when heroin use resumes after:
- Detoxification
- Residential rehabilitation
- A period of abstinence
- Hospital admission
- Imprisonment
- Interruption of medication treatment
During abstinence, tolerance can fall. An amount that was previously used without an immediate overdose may then suppress breathing and become fatal.
Opium addiction
Opium contains naturally occurring opioid compounds. It may be viewed by some families as less harmful because it is plant-derived or has been used traditionally. Natural origin does not prevent tolerance, withdrawal, impaired control or overdose.
Possible signs of opium dependence include:
- Daily or increasingly frequent use
- Using more than intended
- Needing opium to begin the day or function normally
- Constipation and persistent drowsiness
- Anxiety, pain or restlessness when a dose is delayed
- Failed attempts to reduce use
- Increasing priority given to opium over work or family duties
- Continued use despite physical, financial or relationship harm
Some people move between opium, heroin and pharmaceutical opioids according to availability, cost or the need to prevent withdrawal. Assessment should therefore cover every opioid used rather than only the substance the person considers their main drug.
Pharmaceutical opioids and prescription painkiller dependence
Pharmaceutical opioids include medicines used for moderate or severe pain and certain other clinical purposes. Depending on the medicine, they may be short-acting or long-acting.
Prescription pain medicines can be medically appropriate and essential. The presence of a prescription does not prove safety in every circumstance, but neither does physical dependence automatically mean addiction.
Possible warning signs of prescription opioid misuse include:
- Taking larger or more frequent doses than directed
- Using another person’s medicine
- Running out repeatedly before the next prescription is due
- Seeking additional supplies without coordinated medical care
- Crushing or otherwise changing how the medicine is taken
- Using it mainly for intoxication, sleep or emotional relief
- Combining it with alcohol or sedatives
- Continuing despite falls, overdose or impaired functioning
- Repeated inability to reduce use
A person with chronic pain may also have both a genuine pain condition and opioid use disorder. Treatment should address both problems rather than withdrawing pain care or dismissing addiction risk.
Not every painkiller is an opioid
The term painkiller includes several types of medicine. Some pain medicines are opioids, while others belong to completely different drug classes.
Families should identify the medicine from its prescription, packaging or clinician rather than assuming every pain tablet can cause opioid withdrawal or overdose.
Tolerance, physical dependence and addiction are different
Opioid tolerance
Tolerance means that the body has adapted to an opioid and the same amount may produce less of the earlier effect. A person may begin taking more to achieve pain relief, euphoria or relief from withdrawal.
Tolerance can develop during appropriate medical use. It is a warning that treatment should be reviewed, but it does not by itself prove addiction.
Physical dependence on opioids
Physical dependence means that withdrawal symptoms can develop when regular opioid use is stopped or reduced.
This can occur after prescribed treatment as well as non-medical use. A physically dependent patient may need a gradual, clinically planned change rather than an abrupt stop.
Opioid addiction or opioid use disorder
Opioid addiction involves impaired control and continued use despite harm. The person may spend increasing time obtaining, using or recovering from opioids and may be unable to follow repeated decisions to stop.
A person can have tolerance and physical dependence without opioid addiction. A person can also have opioid use disorder even when obvious tolerance or withdrawal is not clearly reported.
Common opioid addiction symptoms
Opioid addiction symptoms may appear across health, behaviour, finances and relationships.
Possible signs include:
- Strong cravings
- Using more or for longer than planned
- Repeated unsuccessful attempts to stop
- Spending substantial time obtaining or using opioids
- Missing work, education or family duties
- Using in unsafe situations
- Continuing despite medical or psychological harm
- Giving up important activities
- Keeping opioid use secret
- Withdrawal when use is reduced
- Increasing tolerance
- Returning to use after treatment despite understanding the risks
The earlier article on drug addiction symptoms explains why drowsiness, pupil changes and altered behaviour cannot establish a diagnosis without the wider pattern.
How opioid use disorder is assessed
Opioid use disorder assessment should be confidential, non-judgemental and clinically detailed. It should not rely only on a urine test, a family accusation or whether the person appears intoxicated during one appointment.
The assessment may examine:
- Which opioids were used
- Whether the product or tablet contents are uncertain
- Frequency and approximate amount
- How the opioid was taken
- Time of the most recent dose
- Cravings and loss of control
- Previous attempts to stop
- Withdrawal symptoms
- Past overdose
- Use of alcohol, benzodiazepines or other substances
- Current prescription medicines
- Pain and other physical conditions
- Depression, trauma, psychosis and suicide risk
- Pregnancy where relevant
- Housing, employment and family support
- Previous treatment and reasons it ended
Clinical diagnosis considers whether opioid use has led to impaired control, cravings, social or occupational harm, risky use and continued use despite consequences. Tolerance and withdrawal may form part of the wider assessment, but they are not counted as opioid-use-disorder criteria when they occur solely during appropriate medical supervision.
What drug tests can and cannot show
A drug test may help identify recent exposure to certain opioids. It cannot independently prove:
- How severe the disorder is
- Why the opioid was used
- The exact amount taken
- Whether the person was impaired at a particular time
- Whether every synthetic opioid was detected
- Whether treatment should be residential or outpatient
Testing supports history and examination. It does not replace them.
Opioid withdrawal symptoms
Opioid withdrawal can develop when regular use is stopped or substantially reduced. It may also be precipitated when certain opioid-blocking or opioid-treatment medicines are introduced at an unsuitable time.
Common opioid withdrawal symptoms include:
- Yawning
- Runny nose and watery eyes
- Sweating
- Restlessness and anxiety
- Dilated pupils
- Goosebumps
- Muscle and joint pain
- Abdominal cramps
- Nausea and vomiting
- Diarrhoea
- Disturbed sleep
- Strong cravings
Withdrawal from heroin and other shorter-acting opioids may begin earlier. Withdrawal from long-acting opioids may begin later and continue for longer.
Opioid withdrawal does not usually produce the same seizure or delirium pattern as abrupt withdrawal from certain sedatives. It can nevertheless create substantial danger through dehydration, pregnancy complications, serious physical illness, severe psychological distress and rapid return to opioid use.
The full guide to drug withdrawal symptoms explains why there is no fixed timeline that applies to every opioid or every patient.
Should opioid withdrawal be managed at home?
A person should not assume that home withdrawal is safe because the expected symptoms are described as uncomfortable rather than usually fatal.
Clinical assessment is especially important when there is:
- Pregnancy
- Previous overdose
- Severe vomiting or diarrhoea
- Serious heart, lung, liver or kidney disease
- Suicidal thoughts
- Use of alcohol or sedatives
- Uncertainty about the drug’s contents
- Repeated unsuccessful detoxification
- No safe support at home
Withdrawal management should also connect the patient directly with continuing opioid addiction treatment. Detoxification without a continuing plan leaves reduced tolerance, cravings and overdose risk largely unaddressed.
Opioid overdose signs
Opioids can suppress the part of the brain that regulates breathing. The combination of unconsciousness, very small pupils and breathing difficulty strongly suggests possible opioid overdose, although not every patient will display every sign.
Call 112 in India immediately when the person:
- Cannot be woken
- Has very slow, irregular or absent breathing
- Makes choking, snoring or gurgling sounds
- Has blue, grey or unusually pale lips or fingertips
- Has a limp body
- Does not respond to speech or touch
- Collapses after known or suspected opioid use
Do not assume that the person is simply sleeping. Do not force food, water, coffee or tablets into their mouth.
How to respond to suspected opioid overdose
When opioid overdose is suspected:
- Call 112 immediately.
- Follow the emergency operator’s instructions.
- If naloxone is available, administer it according to the product instructions while help is being arranged.
- Support breathing or provide basic life support if instructed and able to do so.
- If the person is breathing but unconscious, place them on their side when it is safe.
- Remain with them until emergency help arrives.
Naloxone can temporarily reverse an opioid overdose, but its effect may wear off while the opioid remains active. Emergency medical assessment is still required.
The WHO recommends access to naloxone for people likely to witness an opioid overdose and identifies reduced consciousness and breathing difficulty as major overdose signs.
Why alcohol and sedatives make opioid use more dangerous
Alcohol, benzodiazepines, sleeping pills, barbiturates and some other medicines can also suppress the central nervous system.
Combining them with heroin, opium or prescription opioids can increase:
- Extreme drowsiness
- Poor coordination and falls
- Memory loss
- Vomiting while unconscious
- Breathing suppression
- Coma
- Fatal overdose
The person may not accurately report every substance used. Families should share known alcohol and medicine use with the treatment team, including tablets obtained from more than one source.
Medication-based treatment for opioid addiction
Medication-based treatment is a central evidence-based component of care for opioid use disorder. It should not be treated as merely another form of intoxication or as a temporary substitute that must always be stopped quickly.
WHO’s April 2026 rapid communication on selected opioid-dependence treatment recommendations reaffirmed strong recommendations for opioid agonist maintenance treatment with methadone and oral buprenorphine. It also introduced a conditional recommendation for long-acting injectable buprenorphine while the complete updated guidelines were being finalised.
Medication options used internationally for opioid use disorder include:
- Methadone
- Buprenorphine
- Naltrexone for appropriately selected patients after an opioid-free period
The medicine chosen depends on the patient’s clinical circumstances, informed preferences, previous treatment response, other substance use, medical conditions and local availability.
No patient or family should start, share, stop or change these medicines without qualified clinical supervision.
Why detox alone is not considered adequate opioid treatment
The CDC guidance on opioid use disorder treatment states that detoxification without medication treatment is not recommended because risks of renewed use, overdose and overdose death remain.
Medication treatment is associated with lower overdose risk and lower overall mortality. It can:
- Reduce withdrawal
- Reduce cravings
- Help stabilise opioid use
- Improve treatment retention
- Reduce exposure to unpredictable illicit opioids
- Create stability for psychological and social recovery work
A decision not to participate in counselling should not automatically prevent or delay evidence-based medication for opioid use disorder. Psychosocial support should be offered according to the patient’s needs, but medication should not be withheld solely because counselling is declined or unavailable.
Counselling and rehabilitation
Medication addresses important biological risks, but opioid addiction can also affect behaviour, decision-making, relationships, employment, finances and mental health.
Counselling and rehabilitation may help the patient:
- Understand craving patterns
- Recognise people and places connected with opioid use
- Respond to stress without returning to opioids
- Address depression, trauma or anxiety
- Improve sleep and routine
- Repair family relationships
- Manage money and unstructured time
- Plan for high-risk situations
- Continue treatment after discharge
Counselling should complement evidence-based medication rather than replace it when medication is clinically indicated.
The broader article on drug addiction treatment explains how medical care, behavioural treatment, psychiatric support and family involvement can be combined.
Does every patient need residential rehabilitation?
No. Opioid addiction treatment can take place in outpatient, structured day-care, residential or hospital settings.
Residential rehabilitation may be considered when:
- Overdose has occurred repeatedly
- The home environment contains easy access to opioids
- Several substances are being used
- There is severe psychiatric instability
- The patient cannot attend outpatient treatment reliably
- Previous less intensive treatment has not provided adequate safety
- Housing or family conditions make early recovery unsafe
A stable patient with safe housing and reliable follow-up may be treated successfully without residential admission. The treatment setting should reflect clinical need rather than punishment or family pressure.
Opioid addiction and chronic pain
Some patients develop opioid dependence or opioid use disorder while receiving treatment for genuine pain. Their pain does not become imaginary because addiction has developed.
Care may require coordination between pain, addiction and mental-health professionals. The plan can examine:
- The cause and severity of pain
- Current opioid benefits and harms
- Non-opioid medicines where appropriate
- Physical and psychological pain-management approaches
- Risk of abrupt opioid discontinuation
- Whether medication for opioid use disorder is suitable
Stopping pain care or abruptly withdrawing prescribed opioids without a coordinated plan may increase pain, distress and withdrawal, and may lead the person to seek relief from unsafe or unregulated sources.
Relapse and overdose after reduced tolerance
A return to opioid use is particularly dangerous after tolerance has fallen.
High-risk periods include:
- Immediately after detoxification
- After leaving residential treatment
- After hospital discharge
- After release from prison
- After several opioid-free weeks or months
- After medication treatment is interrupted
A person may return to the amount previously used, not realising that the body can no longer tolerate it. The result may be severe breathing suppression or death.
The WHO opioid-overdose factsheet identifies resuming opioid use after a period of abstinence as a major overdose risk.
What a relapse-prevention plan should include
A useful plan should cover:
- Personal warning signs
- Cravings and triggers
- Immediate treatment contacts
- Medication continuity
- Naloxone access and family education where available
- Alcohol and sedative avoidance
- Plans for money and high-risk social contact
- Response after missed treatment
- Urgent assessment after renewed opioid use
A relapse or lapse should lead to safety assessment and treatment review rather than discharge, humiliation or the assumption that recovery is impossible.
The role of the family
Families often recognise changes before the patient asks for help. Their information can improve assessment when it is specific and factual.
Useful information includes:
- Known opioids and medicines
- Approximate time of the last use
- Previous overdose
- Periods of unconsciousness or abnormal breathing
- Withdrawal symptoms
- Alcohol or sedative use
- Missing tablets or prescriptions
- Earlier treatment and reasons it ended
- Suicidal statements or serious behavioural changes
Families should avoid:
- Public humiliation
- Forcing abrupt withdrawal at home
- Giving borrowed sedatives or pain medicines
- Allowing an intoxicated person to drive
- Leaving an unconscious person alone
- Assuming that naloxone removes the need for emergency care
- Stopping prescribed treatment as punishment
Medication should be stored safely, particularly where children or other vulnerable people could access it.
Questions to ask an opioid treatment programme
Families can ask:
- How is opioid use disorder assessed?
- How are heroin, opium and prescription opioid use distinguished?
- Who assesses overdose and withdrawal risk?
- Is medication-based treatment available or appropriately referred?
- How is medication selected and monitored?
- What happens if the patient does not participate in counselling?
- How are alcohol and sedative use managed?
- Is naloxone education provided where available?
- How are depression and suicide risk assessed?
- What medical emergencies require hospital transfer?
- How is chronic pain addressed?
- What continuing care is arranged after discharge?
A credible programme should not promise that a fixed detox period will cure opioid addiction. It should explain how withdrawal management connects with medication, counselling, overdose prevention and long-term follow-up.
Frequently asked questions
What is opioid addiction?
Opioid addiction, clinically called opioid use disorder, involves impaired control over heroin, opium or another opioid and continued use despite harm or serious risk.
Are heroin and opium the same?
No. Both belong to the opioid group, but heroin is a processed opioid with a different potency and effect profile. Opium is a natural poppy-derived product containing opioid compounds. Both can cause dependence and overdose.
Can prescription painkillers cause opioid addiction?
Yes, certain prescription pain medicines are opioids and can lead to physical dependence or opioid use disorder. Appropriate prescribed use does not automatically mean addiction.
What is the difference between opioid dependence and addiction?
Physical dependence means withdrawal may occur when regular use stops. Addiction additionally involves impaired control, cravings, compulsive use or continued use despite harm.
What are common opioid addiction symptoms?
They include cravings, failed attempts to stop, increasing priority given to opioid use, missed responsibilities, withdrawal, tolerance and continued use despite medical, financial or family harm.
What are the main signs of opioid overdose?
Major signs include inability to wake, very slow or absent breathing and very small pupils. Choking or gurgling sounds and blue or grey lips also require immediate emergency action.
What should families do during a suspected opioid overdose?
Call 112 immediately. Administer naloxone according to the product instructions when available, follow the emergency operator’s directions and remain with the person until help arrives.
Is opioid withdrawal dangerous?
It can be intensely distressing and may cause dehydration, psychological crisis and rapid return to use. Pregnancy, serious illness and use of several substances can increase the danger.
Can opioid addiction be treated with medication?
Yes. Evidence-based medicines used internationally include methadone, buprenorphine and naltrexone for appropriately selected patients. The choice and availability depend on clinical and local circumstances.
Is detox enough to treat heroin addiction?
No. Detoxification manages withdrawal but does not adequately address cravings, reduced tolerance and overdose risk. Continuing medication treatment and other recovery support may be required.
Can medication be given if a patient refuses counselling?
A decision not to participate in counselling should not automatically delay evidence-based medication for opioid use disorder. Psychosocial support should still be offered according to the patient’s needs.
Why is overdose risk higher after rehabilitation?
Opioid tolerance may fall during abstinence. Returning to a previously used amount after discharge can then cause severe breathing suppression or fatal overdose.
Opioid addiction requires more than a standard detox
Opioid addiction can begin with heroin, opium, pharmaceutical opioids or medically prescribed pain treatment. The route may differ, but the central risks include impaired control, withdrawal, overdose and return to use after tolerance has fallen.
Effective opioid addiction treatment begins with an individual assessment. It distinguishes physical dependence from opioid use disorder, identifies every substance involved and checks immediate overdose and withdrawal risk.
For people with opioid use disorder, evidence-based medication is a central treatment option rather than a last resort. Counselling, rehabilitation, psychiatric care, family involvement and relapse planning can then address the wider conditions that sustain opioid use.
Medical disclaimer: This article provides general educational information and does not replace individual medical assessment, diagnosis or treatment. Call 112 in India or go to the nearest emergency department for slow or absent breathing, inability to wake, blue or grey lips, collapse, seizures, severe confusion, suspected overdose, suicidal intent, serious injury or violent behaviour that cannot be managed safely.
