No. Naproxen is not addictive. It is a non-steroidal anti-inflammatory drug, it is not a controlled drug in the UK, it produces no euphoria, and stopping it causes no withdrawal syndrome. If you are asking because you feel you cannot get through a week without painkillers, that is a real thing, and it has a different name.
Why the answer is a flat no
Three separate checks point the same way.
Its own regulatory documentation contains no dependence warning. We read the current Summary of Product Characteristics for naproxen in full. There is no section on abuse potential, no tolerance warning, no withdrawal syndrome and no dependence statement anywhere in it (Naproxen 500mg Tablets SmPC). For a medicine with genuine addictive potential, that absence would be a scandal. Here it is simply accurate.
It is not a controlled drug. Naproxen does not appear on the Home Office list of drugs controlled under the Misuse of Drugs legislation. Codeine does, as a Class B drug (Home Office, List of most commonly encountered drugs currently controlled under the misuse of drugs legislation).
The NHS medicine page does not mention addiction at all (NHS, Naproxen), which is notable given the NHS page on codeine devotes a section to it.
Naproxen works by blocking cyclo-oxygenase enzymes and reducing inflammation. It does not act on the brain’s reward pathways. There is nothing there to become dependent on.
What people usually mean when they ask this
Almost nobody searches this because they suspect naproxen is a secret opioid. The real prompt is usually one of four things, and this is a pattern we observe rather than a finding we can cite: months of painkillers that have started to feel like a habit; trying to stop, feeling worse, and assuming that was withdrawal; somebody commenting on how many you take; or naproxen not being the medicine you are actually worried about, just the one you felt able to search.
Each has a real answer. None of them is naproxen addiction.
The genuine risk of long-term naproxen
It is not dependence. It is cumulative damage, and it deserves more of your attention than the addiction question did.
Naproxen’s product information states that “GI bleeding, ulceration or perforation, which can be fatal, has been reported with all NSAIDs at any time during treatment, with or without warning symptoms or a previous history of serious GI events”, that risk rises “with increasing NSAID doses” and “in the elderly”, and that “patients treated with NSAIDs long-term should undergo regular medical supervision to monitor for adverse events” (SmPC, section 4.4). NICE separately lists NSAID use in the past week among risk factors for acute kidney injury, “especially if hypovolaemic” (NICE NG148).
If you have been taking naproxen habitually for months, the conversation to have with a GP is not about addiction. It is about your stomach, your kidneys, your heart and blood pressure, and why the pain has not resolved.
Medication overuse headache: the thing that genuinely feels like addiction
This is the answer for a large share of people who arrive at this question, and almost nothing written about naproxen mentions it.
If you take painkillers frequently for headaches, the painkillers themselves can start causing the headaches. It is a recognised diagnosis. The International Classification of Headache Disorders describes it as “headache occurring on 15 or more days/month in a patient with a pre-existing primary headache and developing as a consequence of regular overuse of acute or symptomatic headache medication … for more than 3 months. It usually, but not invariably, resolves after the overuse is stopped” (ICHD-3, 8.2).
The frequency thresholds are published as diagnostic criteria, not as guidance about how much to take. NICE tells clinicians to be alert to medication overuse headache in people whose headache developed or worsened while taking, for three months or more, “triptans, opioids, ergots or combination analgesic medications on 10 days per month or more” or “paracetamol, aspirin or an NSAID, either alone or in any combination, on 15 days per month or more” (NICE CG150).
Two details are worth pulling out. Combination painkillers such as paracetamol with codeine sit in the stricter category. And the classification counts non-opioid painkillers cumulatively, so someone alternating naproxen, ibuprofen and paracetamol can reach the threshold without exceeding it on any single one.
The classification itself notes that “the behaviour of some patients with medication-overuse headache is similar to that seen with other drug addictions”. That is why it feels like addiction. It is not the same mechanism, and the way out is different.
Headache has more than one possible cause worth ruling out here. If heavy drinking is also in the picture, alcohol withdrawal can produce headaches in its own right, and that is a separate problem from the one the painkillers are causing.
NICE’s approach is withdrawal of the overused medication, with a warning that symptoms usually worsen before improving, and it advises specialist referral or inpatient withdrawal for people using strong opioids or with relevant comorbidities. Which route applies to you is a decision for a GP, not for a website, and this page is not telling you to stop anything.
The painkillers that are genuinely addictive
If your real question is about a different tablet, this is the part that matters.
Codeine is an opioid. The NHS states plainly: “If you need to take codeine for a long time, your body can become used to having it”, “do not stop taking it codeine suddenly because this can cause withdrawal symptoms such as feeling agitated or anxious”, and “it’s possible to become addicted to codeine” (NHS, Codeine). The odd phrasing in the middle quote is live on the NHS page and we have not tidied it inside quotation marks.
In 2020 the MHRA required warnings on the packaging of all UK opioid medicines, advising prescribers that “long-term use in non-cancer pain (longer than 3 months) carries an increased risk of dependence and addiction” and that “prolonged use of opioids may lead to drug dependence and addiction, even at therapeutic doses” (MHRA Drug Safety Update, 23 September 2020).
The same guidance lists signs of addiction worth reading against your own behaviour: craving the drug even when it is harming your health, needing more or adding other pain-relief medicines, taking the medicine for reasons other than pain, and withdrawal effects when it stops suddenly.
Over-the-counter codeine products carry a required front-of-pack warning: “Can cause addiction. For three days use only” (MHRA Drug Safety Update, over-the-counter painkillers containing codeine or dihydrocodeine). That warning exists because these products are addictive. Naproxen carries no such warning because it is not.
For scale, Public Health England found that in 2017 to 2018, 5.6 million adults in England, 13% of the adult population, received a prescription for an opioid pain medicine, and 540,000 had been prescribed one continuously for the previous three years (PHE, Prescribed medicines review, 2019). Those are prescribing figures, not dependence figures. PHE published no number for how many of those people are dependent, and anyone quoting 5.6 million as a count of painkiller addiction is misreading the report.
How to tell which situation you are in
A rough sorting question, our framing rather than a clinical tool: does stopping make you feel physically unwell, or does it just mean the pain comes back?
Pain returning is pain. The underlying problem is still there and the treatment is not solving it. That is a reason to see a doctor, not a sign of addiction.
Feeling agitated, sweaty, restless, sleepless or sick on stopping points towards physical dependence on something other than naproxen, such as an opioid, though these symptoms are not exclusive to opioid dependence. So does taking tablets for how they make you feel rather than for pain, or hiding how many you take.
If alcohol has become part of the pain management
One combination comes up often enough to name: painkillers during the day, alcohol in the evening, both aimed at the same discomfort. It carries a specific physical risk, because anti-inflammatories and alcohol irritate the same stomach lining by different routes, and it tends to escalate, because tolerance to alcohol builds while the pain does not improve.
The NHS lists signs of alcohol-use disorder including “regularly drinking more alcohol than you mean to”, “difficulty stopping or reducing the amount you drink, even if you want to”, and “needing increasing amounts of alcohol to get the same effect” (NHS, Alcohol-use disorder).
What to do next
If this is about naproxen and you feared you had become addicted: you have not. Ask your GP why you still need it, and about your stomach, kidneys, heart and blood pressure if it has been months.
If it is about codeine, co-codamol, tramadol or another opioid: that is a real dependence risk, it is common, it is not a moral failure, and it is treatable. Tell a GP the actual number of tablets, and do not stop an opioid abruptly on your own.
If drinking is part of it, say that too. People routinely disclose one and not the other, and the advice changes when a doctor knows both.
Our pages on prescription drug addiction and opioid withdrawal go further, and polysubstance use covers the case where more than one thing is involved.
The Orchid Recovery is a private residential addiction and mental health centre in Hang Dong District, Chiang Mai, Thailand, for international English speaking adults, capped at 20 clients. We treat prescription drug and opioid dependence within a residential programme that opens with supervised detox where it is clinically needed. If your answer is a GP appointment and a conversation about naproxen, that is a better outcome than anything we sell, and you can ask us either way.
Sources
- NHS, Naproxen
- NHS, Codeine
- NHS, Alcohol-use disorder
- Naproxen 500mg Tablets, Summary of Product Characteristics, electronic Medicines Compendium
- Home Office, List of most commonly encountered drugs currently controlled under the misuse of drugs legislation
- ICHD-3, 8.2 Medication-overuse headache, International Headache Society
- NICE CG150, Headaches in over 12s: diagnosis and management
- NICE NG148, Acute kidney injury: prevention, detection and management
- MHRA Drug Safety Update, Opioids: risk of dependence and addiction, 23 September 2020
- MHRA Drug Safety Update, Over-the-counter painkillers containing codeine or dihydrocodeine
- Public Health England, Prescribed medicines review: summary, 2019
Frequently Asked Questions
Can you become dependent on naproxen?
Not in the pharmacological sense. Naproxen produces no tolerance requiring escalating amounts, no euphoria and no withdrawal syndrome, and its regulatory product information carries no dependence warning. You can become reliant on it in the everyday sense of relying on something that works, which is a different problem with a different solution.
Why do I feel worse when I stop taking naproxen?
Most often because the pain it was suppressing has returned, which is not withdrawal. If the specific symptom is a worsening headache and you have been taking painkillers frequently, medication overuse headache is worth raising with a GP.
Is naproxen a controlled drug?
No. It does not appear on the Home Office list of drugs controlled under the Misuse of Drugs legislation. Codeine does, as a Class B drug.
Which painkillers are addictive?
Opioids, which include codeine, dihydrocodeine, tramadol, morphine and oxycodone, and the combination products containing them such as co-codamol. The MHRA requires UK opioid packaging to carry the warning "Can cause addiction". Anti-inflammatories like naproxen and ibuprofen, and paracetamol, are not in that category.
Is it dangerous to take naproxen every day?
It carries risk, though not addiction risk. Its product information warns that gastrointestinal bleeding, ulceration or perforation can occur at any time during treatment and without warning symptoms, and asks that long-term users have regular medical supervision. Daily use over months is a reason to see your GP.
I think I am addicted to co-codamol. What should I do?
Tell a GP the real number, without rounding down. Opioid dependence at prescribed amounts is common and recognised, and the MHRA has required UK opioid packaging to carry addiction warnings since 2020. Do not stop abruptly on your own, because withdrawal from opioids should be planned and tapered with medical support.
Can naproxen help with withdrawal from something else?
That is a question for a doctor, not for an article, and self-medicating a withdrawal is how people get hurt. Some withdrawals, particularly from alcohol and benzodiazepines, carry serious medical risk and need proper assessment rather than an over-the-counter solution.
How do I find out whether residential treatment is even relevant?
By asking, which is not the same as applying. A first call covers what you take, how much you drink, what your GP already knows and what you want to be different, and ends with a view on whether an admission would help or whether it would be overkill. Reach us on +66 985 245 093 or at admissions@orchidrecoverythailand.com.
