Co-codamol is one of the most widely prescribed painkillers in the UK, with around 15 million prescriptions dispensed annually in England alone.1 There’s good reason for those numbers. For people dealing with pain that paracetamol on its own can’t manage, co-codamol provides genuine relief that makes day-to-day life more manageable. Co-codamol is a medication used for pain relief, combining paracetamol with codeine, an opiate.
But there’s a side to co-codamol that many people unintentionally overlook. The codeine it contains is an opiate with addictive properties, and with regular use, dependence can develop in a way that catches people off guard. The risk of addiction is due to codeine’s action on the brain, where it binds to opioid receptors and can lead to both physical and psychological dependence. What starts as a legitimate prescription for pain can quietly become something much harder to step away from.
Many individuals who develop co-codamol addiction initially used the medication for genuine medical reasons, but over time, they may begin to rely on it for emotional regulation.
This page explains what co-codamol is, why it carries a risk of addiction, how to recognise the signs, what withdrawal looks like, and what treatment options are available if you’ve reached a point where you need support.
What is co-codamol?
Co-codamol is a combination painkiller that’s made up of paracetamol and codeine phosphate. It’s used to treat mild to moderate pain, especially the type of pain that doesn’t respond to paracetamol alone. Co-codamol is one of several medicines used for pain relief; ibuprofen is another common painkiller, and it is sometimes combined with codeine in compound analgesic formulations.
It’s available in three different strengths in the UK, those being:
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8/500
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15/500
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30/500
The easy way to remember what these mean is that the first number refers to the milligrams of codeine per tablet and the second refers to the milligrams of paracetamol.
In the UK, the 8/500 strength co-codamol tablets can be bought over the counter from a pharmacy, without a prescription. Over the counter codeine is accessible from pharmacies, making it easier for individuals to obtain these medicines without medical supervision. The two other higher dosages, though, will require a prescription to obtain. Taking higher doses than recommended increases the risk of serious health problems, withdrawal difficulties, and potential overdose.
The NHS advises that co-codamol should be taken for however long your doctor tells you to take it for, being careful to not go over the set period of time. The NHS also notes that no more than 8 tablets should be taken within a 24 hour period.
Co-codamol is commonly used to treat pain such as headaches, dental pain, muscle aches, and period pain, which is a frequent reason for initial use, especially among those experiencing menstrual discomfort.
So why are there so many precautions that need to be followed when prescribed co-codamol? What makes the drug different from a standard paracetamol tablet is the codeine. Codiene is an opioid, and while it is considered a weaker substance compared with opioids like heroin, its effects on the brain follow the same pathway.
This is exactly where issues with co-codamol dependency and addiction can start to form.
Is Co-Codamol addictive?
Codeine on its own has a relatively weak effect on the opioid receptors in your brain. However, codeine is addictive and has highly addictive properties, which can lead to drug addiction. The painkilling and mood-altering effects depend almost entirely on its conversion to morphine once it enters the body. This takes place in the liver through an enzyme called CYP2D6, with only around 5 to 10% of codeine being converted this way.3 But regardless, that small amount of morphine is still enough to cause issues.
When morphine binds to opioid receptors, it creates a release of dopamine in the areas responsible for pleasure and reward. This is the same process involved in all opioid addictions 4 and it’s what creates the feelings of relaxation and emotional relief that many desire. These similar effects are sought after in the misuse of codeine and other addictive medicines, as they can produce a ‘buzz’ or pleasurable sensation comparable to other opiates.
If this mechanism happens enough, the brain starts to adapt to the effects. It will start producing less dopamine on its own and become less responsive to the drug at its current dose. This is what’s known as tolerance, and once the tolerance is raised, it’s the stage where some will start to take more to get the same effect as before. Other medicines, such as prescription opioids and sedatives, can also be addictive and lead to similar patterns of tolerance and dependence.
If continued, physical dependence can develop within days to weeks of regular use.
The MHRA has warned that patients finding their treatment less effective or wanting to up their usual dosage is a big indicator that dependence is already developing.
Signs of Co-codamol Addiction
In the last section, we briefly touched upon two of the signs of co-codamol addiction, but there are a whole host of warning signs that are important to understand. This is especially true if you’ve been prescribed co-codamol yourself and have slipped into a routine with the drug that goes beyond the window of time for which it was initially prescribed.
It’s also important to remember that co-codamol addiction can be difficult to initially spot as it develops slowly and without any dramatic signs. There’s rarely a single moment where everything changes for the worse.
Some of these signs of co-codamol addiction could include:
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Taking more tablets than prescribed
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Taking them more frequently than directed
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Running out of a prescription earlier than expected.
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Continuing to take co-codamol after the original pain has resolved.
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Feeling anxious when you know your supply of co-codamol is running low.
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Using co-codamol to manage emotional discomfort rather than physical pain.
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Experiencing withdrawal symptoms between doses (explained in more detail later on)
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Feeling addicted and unable to cope without co-codamol, especially when dealing with emotional pain or stress.
The psychological effects of co-codamol addiction can lead to compulsive behaviour, where individuals feel unable to cope without the drug. Many people turn to co-codamol to cope with emotional pain or stress, not just physical discomfort. This reliance can make it difficult to stop using the medication, even when the original reason for taking it has passed.
Of course, there can be other signs that aren’t listed above, and to understand them, we can revert to the research available. One survey found that codeine users across the UK and Ireland who had developed a dependence were more likely to seek help for their addiction online than from their GP. 7
This could suggest that those who are living with a codeine addiction are attempting to manage it privately without turning to professional support. Some people try self management of their addiction, either independently or by joining support groups, including online communities, which can provide encouragement, advice, and a sense of community.
If any of the signs we mentioned feel familiar, especially if you’re trying to manage a potential dependence to co-codamol on your own, it could indicate more help is needed. Some individuals perceive their addiction as different from other addictions or other forms of substance misuse, often because co-codamol is a legal medicine and they may not identify with stereotypes of illicit drug use. This can lead to feelings of shame and guilt, and many people try to hide their addiction from family and friends.
If you’re unsure where you stand, PCP offers free and confidential conversations where a member of our can help you understand your situation, obligation free. Contact us here.
Co-codamol withdrawal
The NHS explicitly states that if you’ve been taking codeine for more than two weeks, you shouldn’t abruptly stop taking it. Instead, it is important to reduce the dose gradually under medical supervision. Stopping suddenly can cause you to experience withdrawal symptoms, which can be uncomfortable and potentially dangerous.
Essentially, your brain has adapted to the continued presence of codeine and when it’s removed, the compensatory systems that were keeping things balanced start to tip. This produces what’s known as opioid withdrawal.
Codeine is a short acting opioid with a half life of around three to four hours, which means opioid withdrawal symptoms can begin relatively quickly after the last dose.
Withdrawal symptoms from co-codamol can include restlessness, irritability, sweating, and flu-like symptoms. These symptoms usually begin within 12 hours of the last dose and can peak after a few days.
Below is a timeline of what can be expected during codeine withdrawal:
Withdrawal symptoms can last for 1 to 2 weeks, but some symptoms like sleep problems or low mood may persist longer.
A medically supported detox for co-codamol makes the withdrawal process safer and more comfortable, with monitoring to manage symptoms.
8 to 24 hours after the last dose
The earliest symptoms can include:
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Anxiety
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Restlessness
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Muscle aches
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Sweating
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Yawing
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Runny nose
These are all signs that the nervous system is becoming overactive without the opioid to suppress it.
36 to 72 hours
This is when withdrawal tends to peak and some will experience symptoms like:
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Nausea
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Vomiting
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Diarrhoea
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Abdominal cramps
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Insomnia
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Goosebumps
The experience is compared to as a severe flue, though the psychological component like cravings, can feel worse than the physical symptoms.
Days 5 to 10
During this time period, acute symptoms start to ease. Sleep disturbances and low mood may still persist, but the worst of the physical withdrawal is likely behind you.
Day 10 and beyond
Some people experience what’s known as post-acute withdrawal syndrome (PAWS), which includes lingering anxiety, cravings, poor concentration and disrupted sleep.10 This can continue for weeks and sometimes even months after stopping opioids like codeine. This phase is one of the main reasons why relapse rates remain high without ongoing support.
At this point, you’d be forgiven for assuming that this type of withdrawal only applies to those with severe co-codamol addictions and those taking very large amounts. But research shows that even at modest doses, withdrawals can certainly occur. One case report showed that a patient who had been taking only 80-100mg of codeine daily for three months experienced strong withdrawal symptoms.11
This goes to show that while dosage is an important predictor in the likelihood of withdrawal symptoms, the length of consumption also plays a big part.
The Hidden Danger of Paracetamol
If you view pages on the internet that focus on the dangers of co-codamol, many will spend large amounts of time explaining the dangers of codeine, completely overlooking the paracetamol aspect. But it’s something that should certainly be included in the discussion. Every tablet of co-codamol contains 500mg of paracetamol and increasing your dose to chase the effect of codeine means your paracetamol intake rises at the same time.
The maximum safe daily dose of paracetamol is 4 grams 12 and if you’re taking double the recommended amount of co-codamol 30/500, that’s 16 tablets. This puts you at 8 grams of paracetamol every day, twice the safe limit.
At these levels, the liver can no longer process paracetamol safely. A toxic byproduct called NAPQI builds which begins to cause direct damage to liver cells.13
This can lead to acute liver failure, which is life-threatening without emergency treatment. Misuse of co-codamol can also result in serious health problems, including organ damage, gastric bleeding, and even hospitalization.
The pattern of usage is another dangerous aspect, as people who misuse co-codamol will usually take extra tablets throughout the day, rather than in a single setting.
This is known as a staggered overdose, and research found that it actually carries a higher mortality rate than a single large overdose (37% vs 28%).14 Patients with staggered overdoses presented later to hospital, responded less predictably to counter medications and were harder to assess using standard tools.
The same study found that more than half who experienced a staggered or unintentional overdose that caused severe liver injury had used co-codamol specifically.
Mixing co-codamol with alcohol, other drugs, or other substances can increase the risk of extreme drowsiness, breathing problems, overdose, or even death.
This proves that when the topic of conversation lands on co-codamol addiction, paracetamol intake must be taken into consideration.
Co-codamol detox and treatment
If you’ve developed a dependence on co-codamol, stopping abruptly is not recommended. The right treatment for co-codamol addiction should be tailored to your individual needs and may include residential support or inpatient treatment. Inpatient treatment offers the highest level of care in a safe and structured environment, focusing on therapy and recovery skills.
If you’ve been using co-codamol specifically, treatment providers may switch from co-codamol to separate codeine phosphate and paracetamol tablets. This is so that codeine can be reduced independently without pushing paracetamol intake above safe levels. Non-opioid alternatives, such as NSAIDs or standalone paracetamol, can also be considered for pain management to lower dependency risks.
NICE guidelines recommend the use of medications such as methadone or buprenorphine to manage detox, but only in more serious cases.15
Drug detox of any kind, on its own, only addresses the physical dependence. The psychological patterns that drove the addiction in the first place need to be worked through in therapy. This could be due to unresolved pain, self-medicating mental health conditions, emotional avoidance, or habit.
NICE recommends psychological interventions such as cognitive behavioural therapy (CBT), dialectical behaviour therapy (DBT), and motivational interviewing as part of a comprehensive treatment plan for opioid dependence.15 These approaches help you understand what was keeping the pattern in place and give you the tools to manage cravings and triggers going forward. Ongoing support for co-codamol addiction recovery includes developing coping strategies and identifying triggers that lead to use. Peer support groups, such as 12-step programs and SMART Recovery, provide encouragement and accountability for individuals recovering from co-codamol addiction.
Treatment can take place in a residential or outpatient setting, depending on the severity of your dependence and the level of support you need. Residential treatment provides 24-hour clinical oversight and a structured environment, while outpatient care allows you to continue living at home while attending scheduled sessions. Residential support also allows individuals to focus on therapy in a community-based setting while living at home. Integrated treatment is available for those with co-codamol addiction and co-occurring mental health concerns, such as anxiety or depression.
Some individuals may seek help from alcohol services, but these may not always be tailored to OTC medicine addiction, so it’s important to find the most appropriate support for your needs.
When to seek help
If your co-codamol use has moved beyond what was originally prescribed, or if you’ve been buying it over the counter more frequently than you’d like to admit, that’s worth taking seriously. You don’t need to have reached a point of crisis before seeking support.
Many people who develop co-codamol addiction do not have a history of using illicit substances or illegal drugs. Research indicates that dependence on codeine can occur even in those without prior drug abuse or experience with illicit substances. Codeine abuse often starts with misuse of a legitimate prescription and can progress to addiction, even if you have never used illegal drugs. It’s important to recognise that drug abuse of prescription medicines like co-codamol is a growing concern and is distinct from addiction to illegal drugs.
Ask yourself:
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Am I taking more co-codamol than I was originally told to?
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Do I feel unwell when I miss a dose?
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Am I using it for reasons other than the pain it was prescribed for?
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Have I found myself thinking about when my next dose is?
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Am I worried about what would happen if I tried to stop?
If any of those questions sit uncomfortably, it may be time to speak with someone who can help you understand your options.
PCP provides private residential treatment for co-codamol and codeine addiction, with medically supervised codeine detox, structured therapy, and aftercare support. If you’re unsure whether your situation warrants treatment, a confidential conversation with our team can help you work out what the right next step looks like.
Contact PCP today to speak with a member of our team.
