Codeine is an opioid medicine with risks of dependence, addiction and overdose. Risks vary with the person, dose, duration and other substances. Suspected overdose needs urgent help: call emergency services if breathing is slow or difficult, or the person cannot be woken.
Codeine is used for pain and in some cough medicines, subject to product and country restrictions. This article explains its risks, warning signs and treatment options.
Codeine use does not inevitably lead to heroin use. Opioid use disorder can develop with prescription or nonmedical opioid use and is treatable.
Legal controls depend on the country and product. Ask a pharmacist about the formulation and restrictions that apply to your medicine.
Use codeine only as directed for the person it was supplied for. Do not share it or take someone else’s prescription.
The body converts part of a codeine dose into morphine. Genetic differences in metabolism mean effects and toxicity can vary markedly between people.
Codeine can cause pain relief, drowsiness and sometimes euphoria. Unpredictable effects make nonmedical use unsafe.
Read Also: The Dangers of mixing Clonidine and Alcohol
Codeine is sometimes called a weak opioid because of its relative analgesic potency. This does not mean it is harmless: potentially fatal respiratory depression can occur.
The benefits and risks of treatment should be reviewed with a clinician, particularly if use is prolonged or the dose is increasing.
Addiction is not a moral failing and does not require an intentional decision to become dependent. It can develop during prescribed treatment as well as nonmedical use.
Nonmedical use can affect people of different ages and backgrounds. Avoid assuming that a particular age group or social setting explains every case.
Tolerance and physical dependence can occur during prescribed use and do not by themselves establish addiction. Continued harmful or compulsive use requires assessment for opioid use disorder.
Misuse includes taking more than directed, using someone else’s medicine or taking codeine for nonmedical effects.
Codeine-containing drinks may be called lean, purple drank or sizzurp. Their contents and strength can vary, which increases uncertainty and risk.
Mixing codeine with alcohol, other opioids or sedatives increases the risk of profound sedation, respiratory depression, coma and death.
Related: Sleeping Pills Abuse
Avoid alcohol and unapproved sedative combinations. If several medicines have been prescribed, ask the prescriber or pharmacist to check interactions rather than changing them independently.
And can codeine kill you?
Yes. Codeine can cause fatal respiratory depression, especially with interacting substances or in vulnerable people. Do not wait for a particular dose threshold before seeking help.
Changing how a medicine is taken, including crushing or snorting it, is misuse and can increase harm.
If pain relief is inadequate, contact the prescriber. Do not increase the dose or change the route yourself.
Severe drowsiness, slowed breathing, confusion or unconsciousness may signal overdose and need emergency assessment.
Taking more than directed increases risk. If this is happening, seek help without blame or shame.
Signs of intoxication, physical dependence and opioid use disorder can overlap, but they are not interchangeable diagnoses.
But, before we get to it, let’s take a look at what codeine does to the body.
Side effects can occur even when codeine is taken as directed. Their likelihood and severity depend on the individual and other medicines.
People may misuse codeine for different reasons, including unmanaged pain or distress. Assessment should address these needs as well as substance use.
Possible adverse effects range from common constipation or nausea to emergencies such as seizures or slow breathing:
- Stomach cramps
- Constipation
- Nausea
- Dizziness
- Dry mouth
- Low blood pressure
- Blurred or tunnel vision
- Seizures
Other possible symptoms and complications include:
- Shallow breathing
- Difficulty passing urine
- Headache
- Small pupils, particularly with opioid intoxication
- Short attention span
- Mood swings
- Agitation
- Allergy
- Decreased libido
- Flushing
- Itching skin
- Coordination problems
There is no six-to-nine-month threshold before harm begins. Serious adverse effects or overdose can occur early, while repeated use may lead to dependence and other problems.
Longer-term concerns and complications that need assessment include:
- Memory deficits
- Anxiety
- Fatigue
- Injury related to falls or severe overdose
- Toxicity from other ingredients in combination products, such as paracetamol
- Muscle spasms
Fatal overdose is possible at any stage of use.
Do not assume opioid intoxication is the same as alcohol intoxication or judge safety from coordination alone. Abnormal breathing or inability to wake is an emergency.
Opioid use disorder involves a problematic pattern of use with impairment or distress. Physical tolerance or withdrawal during appropriate medical treatment alone is not enough to establish the diagnosis.
Stopping can be difficult, but effective support and treatment are available.
Additional risk factors for codeine addiction and dependence include:
- Trauma, pain or other mental health problems may contribute to risk, but do not make addiction inevitable.
- Family history can reflect genetic and environmental influences; it does not determine a person’s future.
- Unsecured medicines can enable accidental ingestion or nonmedical use. Store them safely and do not share them.
- Stress and social influences can affect substance use. Addiction is not simply a lack of willpower.
- Earlier substance use can be associated with later problems. Individual assessment is more useful than stereotypes about young people or social settings.
A person struggling with codeine addiction shows the following signs and symptoms:
These behaviors may prompt assessment, but no single item establishes addiction:
- Going “doctor shopping” to acquire multiple codeine prescriptions.
- Buying codeine illegally.
- Faking codeine prescriptions.
- Stealing codeine pills or prescriptions from other people.
- Become isolated from family and friends.
- Lying about codeine abuse.
- Consuming the drug in a compulsive manner, without being considerate of the consequences.
- Trying to but not being able to quit codeine.
- Combining codeine with alcohol or other pain pills.
- Withdrawal after stopping regular use, which indicates physical dependence but does not alone prove addiction
Approach concerns supportively and arrange professional assessment. For suspected overdose, seek urgent help immediately.
Withdrawal can occur after reducing or stopping codeine when physical dependence has developed, including during prescribed use.
In many cases, codeine withdrawal symptoms are loaded with discomfort, while in some cases, they can be excruciatingly painful.
The presence and severity of withdrawal vary with dose, duration, individual health and how treatment is reduced.
Withdrawal reflects adaptation to regular opioid exposure; it is distinct from the loss of control that may occur in opioid use disorder.
Do not substitute another opioid or use alcohol or sedatives to manage withdrawal. A clinician can discuss safer treatment options.
Now, many of the signs of lean withdrawal represent as symptoms of flu. Besides that, the following symptoms of codeine detox can also cause severe discomfort:
- Diarrhea
- Nausea
- Vomiting
- Profuse sweating
- Teary eyes
- Goosebumps
- Runny nose
- Anxiety
- Agitation
- Restlessness and nervousness
- Cravings for the drug
- Inability to concentrate
- Depression
- Insomnia
- Light-headedness
- Fast heartbeat; a new irregular heartbeat, chest pain or fainting needs medical assessment
- Stomach aches
- Muscle weakness
Codeine Withdrawal Timeline
Withdrawal from short-acting opioids may begin within hours and acute symptoms often improve over several days. Timing varies; a fixed seven-day deadline is not reliable.
Cravings, sleep disturbance or mood symptoms may persist longer and need follow-up.
Persistent depression or anxiety should be assessed rather than automatically attributed to withdrawal.
There is no universal one-week-to-one-month endpoint. A clinician can assess progress and complications.
Dose, duration, other substances and physical or mental health affect the course; symptom severity alone does not measure addiction severity.
Withdrawal care should be planned with a clinician. Some people can be treated safely as outpatients; others need supervised or inpatient care.
The appropriate setting depends on medical stability, pregnancy, other substance use, mental health, support and previous withdrawal difficulties.
Opioid withdrawal is usually not directly life-threatening in otherwise healthy adults, but dehydration, medical complications and return to use can be dangerous. It does not automatically require 24-hour admission.
Do not abruptly stop regular prescribed codeine without discussing a plan. Gradual reduction may be appropriate for physical dependence; opioid use disorder needs a broader treatment plan.
For opioid use disorder, medicines such as buprenorphine or methadone can reduce withdrawal, cravings and overdose risk. Naltrexone is another option for suitable patients after the required opioid-free interval. Treatment choice needs clinical assessment.
Detoxification alone is not recommended treatment for opioid use disorder. Ongoing care and access to naloxone matter: tolerance falls after abstinence, so returning to a previously used dose can cause overdose.
Drug effects and clearance vary. An assumed 24-hour clearance time cannot be used to prevent or rule out overdose.
Follow the instructions for your exact product and prescription. Combination medicines may contain ingredients with their own dose limits.
But the question is, how much codeine is too much?
There is no universal toxic or fatal dose. Overdose can occur at lower doses in susceptible people, especially with alcohol, sedatives or other opioids. Do not use a numerical threshold to decide whether help is needed.
Risk depends on metabolism, tolerance, breathing conditions, organ function and interacting substances as well as the amount taken.
A single overdose can be fatal, but prompt emergency treatment can save a life.
Severe overdose may cause oxygen deprivation and other complications, including:
- Brain injury
- Liver failure
- Kidney failure
- Seizures
- Pulmonary edema
- Skeletal muscle breakdown
Call emergency services immediately for slow or abnormal breathing, blue lips, collapse or inability to wake. Give naloxone if available and follow its instructions; repeat doses may be needed. Stay with the person. If not breathing normally, follow dispatcher-guided CPR; if unconscious but breathing normally, use the recovery position. Do not induce vomiting. Other warning signs include:
- A blue tint to the skin and nails
- Cold skin
- Decreased heart rate
- Depressed breathing
- Low blood pressure
- Drowsiness
- Fatigue
- Loss of consciousness
- Weak pulse
- Weakness
- Loss of coordination
- Confusion
- Delirium
Symptoms may worsen and not all signs must be present. For any suspected overdose, obtain urgent poison-service or medical advice rather than waiting.
Codeine can help selected patients when used as directed, but it carries opioid risks.
Nonmedical use and combinations with alcohol or sedatives increase harm.
Persistent side effects, escalating doses or difficulty controlling use warrant assessment.
Combination products may cause additional toxicity, including liver injury from excess paracetamol or kidney and gastrointestinal harm from excess ibuprofen.
Recovery is possible. There is no guaranteed first-week turning point, but treatment can reduce symptoms and support longer-term recovery.
Seek a clinician or addiction service for a plan that addresses pain, physical dependence, substance use and mental health.
You deserve care without judgment. Ask about evidence-based treatment and naloxone, and seek emergency help for suspected severe overdose.
