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Co-codamol 8/500mg Effervescent - 32 Effervescent Tablets

Co-codamol 8/500mg Effervescent - 32 Effervescent Tablets

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  • ✔️ Combines codeine and paracetamol for stronger pain relief
  • ✔️ Effervescent format absorbs faster than standard tablets
  • ✔️ Relieves headaches, migraines, and muscular pain effectively
  • ✔️ Suitable for adults needing step-up relief from paracetamol
  • ✔️ 32-tablet pack provides extended short-term pain management

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What Are Co-codamol Effervescent Tablets Used For?

 

If you're dealing with a stubborn headache, a migraine that won't quit, or general aches and pains that paracetamol alone isn't shifting, co-codamol effervescent tablets could be worth considering. This 32-tablet pack contains co-codamol 8/500mg — a combination of 8mg codeine phosphate and 500mg paracetamol per tablet — formulated to dissolve quickly in water for faster absorption compared to standard solid tablets. It's available over the counter in the UK without a prescription at this strength, making it a practical option for short-term pain management at home.

Co-codamol is one of the most widely used combination analgesics in the UK. The NHS recognises it as suitable for mild to moderate pain that hasn't responded adequately to paracetamol or ibuprofen alone. Whether you're managing a tension headache, dental pain, or muscular discomfort, this effervescent format dissolves in a glass of water and is easy to take — particularly useful if you find swallowing tablets difficult. You can explore our full pain relief collection if you're looking for additional options alongside this product.

 

How Does Co-codamol 8/500mg Work in the Body?

 

Co-codamol works through two complementary mechanisms, which is why it tends to be more effective than either ingredient on its own.

  • Paracetamol (500mg): Inhibits the production of prostaglandins in the brain and spinal cord — chemicals that sensitise nerve endings to pain. It also acts on the hypothalamus to help reduce fever.
  • Codeine phosphate (8mg): A mild opioid analgesic that is partially converted to morphine in the liver. It binds to opioid receptors in the central nervous system, reducing the perception of pain and altering the emotional response to it.
  • Effervescent formulation: Dissolving the tablet in water before ingestion means the active ingredients are already in solution when they reach the stomach, which can speed up absorption compared to solid oral tablets.

The combination of these two mechanisms means you get both peripheral and central pain relief working together. That's why co-codamol is often recommended when standard single-ingredient analgesics haven't provided enough relief.

 

Who Is Co-codamol 8/500mg Suitable For?

 

This product is intended for adults and young people aged 16 and over. It's particularly suited to those who need a step up from paracetamol or ibuprofen for short-term pain management. However, it's not appropriate for everyone — and it's important to check suitability before use.

  • Adults aged 16 and over with mild to moderate pain
  • People who find swallowing solid tablets difficult
  • Those managing headaches, migraines, dental pain, or muscular aches
  • Individuals whose pain has not responded adequately to paracetamol alone

It is not suitable for children under 12 years of age. The NHS also advises against use in children and adolescents aged 12–18 who have breathing problems. Always read the patient information leaflet before use.

 

How Does Co-codamol Compare to Standard Paracetamol Tablets?

 

Feature Co-codamol 8/500mg Effervescent Paracetamol 500mg Tablets
Active ingredients Codeine 8mg + Paracetamol 500mg Paracetamol 500mg only
Pain relief level Mild to moderate pain Mild pain
Formulation Effervescent (dissolves in water) Solid tablet (swallowed whole)
Prescription required (UK) No (OTC at 8/500mg strength) No

 

How Should You Store Co-codamol Effervescent Tablets?

 

Store your co-codamol effervescent tablets below 25°C in a dry place, away from direct sunlight and moisture. The effervescent formulation is particularly sensitive to humidity — keep the tube or packaging tightly closed after each use. Do not store in a bathroom cabinet where steam and moisture are common.

Keep all medicines out of the reach and sight of children. Do not use after the expiry date printed on the packaging. If you're unsure whether a medicine is still safe to use, your local pharmacist can advise. If you're managing multiple health conditions and need to keep track of various medicines, our first aid collection includes useful storage and health management products.

This product is a medicine. Speak to your doctor or pharmacist before using if you have an underlying medical condition or are taking other medicines.

Co-codamol 8/500mg Effervescent - 32 Effervescent Tablets specifications
Treatment category Analgesic / Antipyretic
Mechanism of action Opioid receptor agonism (codeine) + prostaglandin synthesis inhibition (paracetamol)
Effective for Mild to moderate pain, headache, migraine, fever
Suitable for Adults and young people aged 16 and over
Active ingredient Codeine phosphate 8mg, Paracetamol 500mg
Pack size 32 effervescent tablets
Strength 8mg/500mg per tablet
UK classification Pharmacy (P) medicine
Drug class Opioid analgesic combination
Preparation Effervescent tablet
Route of administration Oral (dissolved in water)

Specifications of Co-codamol 8/500mg Effervescent - 32 Effervescent Tablets

 

What Is Co-codamol 8/500mg and What Is It Used For?

 

Co-codamol 8/500mg effervescent tablets are an over-the-counter combination analgesic used for the short-term relief of mild to moderate pain. Each tablet contains two active ingredients: 500mg of paracetamol and 8mg of codeine phosphate. When dissolved in water, they form an oral solution that is absorbed through the gastrointestinal tract. The NHS recommends co-codamol for conditions including headache, migraine, toothache, period pain, and general muscular aches where paracetamol alone has not been sufficient.

This product is classified as a Pharmacy (P) medicine in the UK, meaning it can be sold without a prescription but only under the supervision of a pharmacist. It is not intended for long-term use. If your pain persists beyond three days, you should seek advice from your GP or pharmacist rather than continuing to self-medicate.

 

What Do You Need to Know Before Using Co-codamol Effervescent Tablets?

 

Before taking this medicine, it's essential to check whether it's appropriate for you. There are several important contraindications and warnings to be aware of.

Do not take co-codamol if you:

  • Are allergic to paracetamol, codeine, or any other ingredient in the tablet
  • Are under 12 years of age
  • Are aged 12–18 and have breathing problems (e.g. asthma)
  • Are a known ultra-rapid metaboliser of codeine (CYP2D6 ultra-rapid metaboliser)
  • Are breastfeeding
  • Have severe liver or kidney disease
  • Have a condition causing raised intracranial pressure
  • Are taking or have recently taken monoamine oxidase inhibitors (MAOIs)

Known drug interactions — take care if you are also taking:

  • Other opioid analgesics (e.g. tramadol, morphine)
  • Sedatives, sleeping tablets, or anxiolytics (e.g. diazepam)
  • Tricyclic antidepressants (e.g. amitriptyline)
  • Anticoagulants such as warfarin (paracetamol can affect INR at higher doses)
  • Alcohol — increases the risk of sedation and liver damage
  • Other paracetamol-containing products — risk of accidental overdose

Always check with your pharmacist if you are unsure whether co-codamol is safe to take alongside your current medicines. If you're managing other conditions alongside pain, our cold and flu collection includes products that may also help with associated symptoms such as fever and congestion.

 

How Should You Take Co-codamol 8/500mg Effervescent Tablets?

 

Always follow the instructions on the patient information leaflet or as directed by your pharmacist. Do not exceed the recommended dose.

  1. Drop 1–2 tablets into a full glass of water (approximately 200ml).
  2. Wait for the tablets to fully dissolve — this usually takes around 1–2 minutes.
  3. Stir gently if needed, then drink the solution immediately.
  4. Repeat every 4–6 hours as required for pain relief.
  5. Do not take more than 8 tablets in any 24-hour period.
  6. Do not take for more than 3 days without seeking medical advice.
Indication Age Group Dose Frequency
Mild to moderate pain / fever Adults and young people aged 16+ 1–2 tablets Every 4–6 hours (max 8 tablets/24 hrs)
Not recommended Children under 12
Use with caution / seek advice Ages 12–15 As directed by pharmacist Every 6 hours (max 4 doses/24 hrs)

 

What Are the Possible Side Effects of Co-codamol 8/500mg?

 

Like all medicines, co-codamol can cause side effects, although not everyone will experience them. Knowing what to look out for helps you use this medicine safely.

Common side effects:

  • Constipation
  • Nausea or feeling sick
  • Drowsiness or dizziness
  • Headache (particularly with prolonged use — known as medication overuse headache)

Less common side effects:

  • Vomiting
  • Skin rash or itching
  • Difficulty urinating
  • Mood changes or confusion
  • Dependence or withdrawal symptoms with prolonged use

If you notice signs of a serious allergic reaction — such as swelling of the face, lips, or throat, difficulty breathing, or a severe skin rash — stop taking the tablets immediately and seek emergency medical help. Liver damage is a risk if paracetamol is taken in excess; never take additional paracetamol-containing products at the same time.

 

How Should You Store Co-codamol 8/500mg Effervescent Tablets?

 

Correct storage helps maintain the effectiveness and safety of this medicine. Follow these guidelines carefully, especially given the moisture-sensitive nature of effervescent tablets.

  • Store below 25°C in a cool, dry place
  • Keep away from direct sunlight and sources of heat
  • Do not store in a bathroom or near a kitchen sink — humidity can degrade effervescent tablets
  • Keep the tube or packaging tightly sealed after each use
  • Keep out of the reach and sight of children at all times
  • Do not use after the expiry date printed on the packaging
  • Do not dispose of medicines via wastewater or household waste — return unused medicines to your pharmacy

If you're looking for complementary health products to support your overall wellbeing, our vitamins and supplements collection includes a range of options that may support immune function and general health alongside your pain management routine.

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Your safety and success are our highest priorities. Our medical team rigorously evaluates every product and piece of advice we provide, ensuring you receive only the most effective, science-backed solutions available.

Frequently Asked Questions

Where can I buy co-codamol effervescent tablets online in the UK?

You can buy Co-codamol 8/500mg effervescent tablets directly from Cured Pharmacy, a GPhC-registered UK online pharmacy. No prescription is needed for the 8/500mg strength, but you'll need to complete a short suitability questionnaire to confirm the product is appropriate for you. Once approved, your order is dispatched promptly to your door.

How do co-codamol effervescent tablets work in the body?

Co-codamol contains two active ingredients that work together. Paracetamol reduces pain signals and lowers fever by inhibiting prostaglandin synthesis in the brain and spinal cord. Codeine phosphate is a mild opioid that binds to receptors in the central nervous system, reducing the perception of pain — making the combination more effective than either ingredient alone for mild to moderate pain.

How do I take co-codamol 8/500mg effervescent tablets step by step?

Drop 1–2 tablets into a full glass of water and wait for them to fully dissolve before drinking. Take the solution every 4–6 hours as needed, and never exceed 8 tablets in any 24-hour period. Do not swallow the tablets whole — they must be dissolved in water first.

What is the maximum dose of co-codamol 8/500mg in 24 hours?

The maximum dose for adults and young people aged 16 and over is 2 tablets every 4–6 hours, up to a maximum of 8 tablets in any 24-hour period. Exceeding this dose significantly increases the risk of serious liver damage from the paracetamol component. Always leave at least 4 hours between doses.

What are the side effects of co-codamol effervescent tablets?

Common side effects include constipation, nausea, drowsiness, and dizziness. Less commonly, some people experience vomiting, skin rash, difficulty urinating, or mood changes. If you develop signs of a serious allergic reaction — such as facial swelling or difficulty breathing — stop taking the tablets immediately and seek emergency medical help.

Who should not take co-codamol 8/500mg tablets?

Co-codamol is not suitable for children under 12, people who are known ultra-rapid metabolisers of codeine, those with severe liver or kidney disease, or anyone who is breastfeeding. It should also be avoided by people currently taking MAOIs or other opioid medicines. Always check with your pharmacist if you are unsure.

Can I take co-codamol if I am pregnant?

Co-codamol is generally not recommended during pregnancy, particularly in the third trimester, as codeine can cause breathing difficulties in the newborn. If you are pregnant or trying to conceive, speak to your GP or midwife before taking any pain relief. They can advise on the safest options for your stage of pregnancy.

What happens if I accidentally take too much co-codamol?

Taking too much co-codamol is a medical emergency, even if you feel well, because paracetamol overdose can cause delayed but serious liver damage. Go to your nearest A&E department immediately or call 999 if you think you or someone else has taken too much. Take the packaging with you so medical staff can see exactly what was taken.

What happens if I miss a dose of co-codamol?

If you miss a dose, take it as soon as you remember — unless it is nearly time for your next scheduled dose, in which case skip the missed dose entirely. Never take a double dose to compensate. Co-codamol is taken as needed for pain, so missing a dose is unlikely to cause problems as long as you don't exceed the daily maximum.

How long can you take co-codamol for safely?

Co-codamol 8/500mg is intended for short-term use only — no longer than 3 days without seeking medical advice. Using it regularly for longer periods can lead to codeine dependence and may cause medication overuse headache, where the pain relief itself starts to trigger more frequent headaches. If your pain persists beyond 3 days, speak to your GP.

Can co-codamol cause medication overuse headache?

Yes — taking co-codamol (or any painkiller) on more than 10–15 days per month can lead to medication overuse headache, sometimes called a rebound headache. This is a recognised condition where frequent analgesic use paradoxically makes headaches worse over time. The NHS advises limiting painkiller use and speaking to your GP if you find yourself needing pain relief very frequently. You can also explore our pain relief collection for alternative options.

Can I drink alcohol while taking co-codamol effervescent tablets?

No — you should avoid alcohol while taking co-codamol. Alcohol increases the sedative effects of codeine, raising the risk of drowsiness, dizziness, and impaired coordination. It also increases the risk of liver damage when combined with paracetamol. Do not drive or operate machinery if you feel drowsy after taking this medicine.

What are the alternatives to co-codamol for headache and migraine?

Alternatives include paracetamol alone, ibuprofen, aspirin, or combination products such as paracetamol with caffeine. For migraines specifically, triptans (available on prescription) are often more effective. If you're looking for other options, our cold and flu collection also includes products that can help manage fever and associated symptoms. Always speak to your pharmacist about which option is most appropriate for your situation.

Is co-codamol 8/500mg the same as prescription co-codamol?

No — prescription co-codamol is available in higher strengths, such as 15/500mg and 30/500mg, which contain significantly more codeine per tablet. The 8/500mg strength available over the counter contains a lower dose of codeine and is suitable for mild to moderate pain. Higher-strength formulations require a prescription from a GP and are used for more severe pain under medical supervision.

What are the latest guidelines on codeine use in the UK?

The MHRA and NHS have issued guidance highlighting the risks of codeine dependence and the importance of short-term use only. Since 2013, codeine-containing medicines have been contraindicated in children under 12 and in those aged 12–18 with breathing problems. Current guidance also recommends that patients are counselled about the risk of dependence before starting codeine-containing products, even at OTC strengths.

How Should You Use Co-codamol 8/500mg Effervescent Tablets?

Co-codamol 8/500mg effervescent tablets must always be dissolved in water before taking — never swallow them whole or chew them. The effervescent formulation is designed specifically to be taken as a solution, which also makes it easier on the stomach. Follow these steps each time you take a dose:

Take with or without food. If you experience nausea, taking the dissolved solution with a light snack may help settle your stomach.

What Is the Correct Dose of Co-codamol 8/500mg?

The correct dose depends on your age and the condition being treated. Always use the lowest effective dose for the shortest time necessary. Never take more than the maximum stated dose, and always leave at least 4 hours between doses to avoid accidental paracetamol overdose.

When Is the Best Time to Use Co-codamol 8/500mg?

Take co-codamol as soon as pain begins rather than waiting for it to become severe — this tends to give better results. For headaches and migraines, early intervention is particularly important, as pain that has escalated can be harder to manage. If you are taking it for a recurring condition such as period pain, you may find it helpful to take the first dose at the onset of symptoms rather than waiting.

Avoid taking co-codamol late at night unless necessary, as the codeine component can cause drowsiness. If you do take it in the evening, do not drive or operate machinery afterwards. Space your doses evenly throughout the day to maintain consistent pain relief without exceeding the daily maximum.

How Long Can You Use Co-codamol 8/500mg For?

Co-codamol 8/500mg is intended for short-term use only. The NHS advises that you should not take it for more than 3 days without seeking advice from your GP or pharmacist. Using it beyond this period — particularly on a daily basis — increases the risk of developing codeine dependence and can lead to medication overuse headache, where the painkiller itself begins to cause more frequent headaches.

If your pain has not improved after 3 days, or if it is getting worse, stop taking the tablets and consult your GP. Do not use co-codamol as a long-term solution for chronic pain without medical supervision. Your doctor can assess the underlying cause of your pain and recommend a more appropriate treatment plan if needed.

Do not exceed the recommended dose. If in doubt, speak to your pharmacist.

What Are the Most Common Side Effects of Co-codamol 8/500mg?

Most people tolerate co-codamol well when taken at the recommended dose for a short period. However, some side effects are relatively common, particularly those related to the codeine component. If any of these bother you or don't improve, speak to your pharmacist.

  • Constipation — the most frequently reported side effect of codeine-containing medicines
  • Nausea or feeling sick
  • Drowsiness or sedation
  • Dizziness or light-headedness
  • Headache (particularly with regular or prolonged use)

What Are the Less Common Side Effects of Co-codamol 8/500mg?

Less commonly, some people experience side effects that are more unusual. These are worth being aware of, even if they affect only a small proportion of users. If you notice any of the following, stop taking the tablets and seek advice from your pharmacist or GP.

  • Vomiting
  • Skin rash, itching, or hives
  • Difficulty urinating or urinary retention
  • Mood changes, confusion, or feeling unusually euphoric
  • Dry mouth
  • Sweating
  • Dependence or withdrawal symptoms if used regularly over a prolonged period

What Are the Serious Side Effects of Co-codamol 8/500mg?

Serious side effects are rare but require immediate medical attention. Paracetamol overdose — even accidental — can cause severe and potentially fatal liver damage, which may not be apparent until several days after the overdose. Never take additional paracetamol-containing products alongside co-codamol. Signs of liver problems include yellowing of the skin or eyes (jaundice), dark urine, and severe abdominal pain.

Codeine can also cause respiratory depression — slowed or shallow breathing — particularly in people who are ultra-rapid metabolisers of codeine or in those taking other sedative medicines. Seek emergency help immediately if you or someone else experiences very slow or difficult breathing, extreme drowsiness, or loss of consciousness after taking co-codamol.

What Should You Do If You Experience Side Effects of Co-codamol?

For mild side effects such as constipation or nausea, practical measures can help — staying well hydrated, eating a high-fibre diet, and taking the dissolved solution with food may reduce discomfort. If drowsiness is a problem, avoid driving or operating machinery until you know how the medicine affects you. Do not take additional doses to try to counteract side effects.

If you experience any side effect that concerns you, or if a side effect persists or worsens, contact your pharmacist or GP. In the case of a suspected overdose or serious allergic reaction — including facial swelling, difficulty breathing, or a severe skin reaction — call 999 or go to your nearest A&E immediately.

Can Co-codamol Interact With Other Medicines?

Yes — co-codamol has several clinically significant interactions. Taking it alongside other medicines that cause drowsiness (such as sleeping tablets, antihistamines, or anxiety medicines) can increase sedation to a dangerous level. Combining it with other opioid analgesics increases the risk of respiratory depression. Warfarin users should be aware that regular paracetamol use can affect INR levels, potentially increasing bleeding risk. Always tell your pharmacist about all medicines, supplements, and herbal remedies you are taking before starting co-codamol.

If you are concerned about any side effects, contact your pharmacist or GP immediately.

Patient Information Leaflet

Important - Before taking any medication, it is always important to read the Patient Information Leaflet (PIL)

Written and reviewed by our qualified team

GPhC Number: 2233073
Tarun Kumar

Reviewed by:

Tarun Kumar

Superintendent/ Clinical Lead

📖 Find out more about our team of medical content authors and how we ensure the accuracy of our content with our content guidelines.

Content last updated: 31 Mar 2025

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