Description
Buy Codeine Phosphate 30 mg – 50 Tablets Online UK

Key Product Information
- Active ingredient: Codeine phosphate
- Strength: Codeine Phosphate 30mg tablets
- Drug class: Opioid analgesic
- Primary use: Treatment of acute moderate pain
- Other therapeutic uses: Dry cough, painful cough, and diarrhoea management
- Administration method: Oral tablets
- Target patients: Adults and adolescents (12–18 years) when prescribed
Codeine Phosphate 30mg Tablets BP are a well-known opioid analgesic medicine used for the relief of acute moderate pain when standard pain relievers are not strong enough. Codeine phosphate works by acting on the central nervous system to help reduce the sensation of pain and discomfort. Because of its analgesic properties, codeine phosphate tablets are commonly prescribed for short-term pain management in clinical settings.
These codeine phosphate 30mg tablets are designed for oral administration, allowing the medicine to be absorbed through the digestive system and metabolised by the body. After ingestion, codeine is processed in the liver where part of it is converted into morphine through CYP2D6 metabolism, helping to block pain signals and provide effective relief.
In addition to treating acute moderate pain, codeine phosphate tablets may also be used in certain cases to help manage:
- Dry cough
- Painful cough
- Diarrhoea
This makes codeine phosphate a versatile medication in medical practice when used appropriately and under proper guidance.
What is Codeine Phosphate?
Codeine phosphate is a medication that belongs to a group of medicines known as opioid analgesics, which are used to relieve pain. It works by acting on the central nervous system to reduce the way the body perceives pain signals. Because of its analgesic and cough-suppressing properties, codeine phosphate tablets are widely used in medical practice for the management of acute moderate pain and certain types of cough.
After oral administration, codeine phosphate is absorbed into the bloodstream and processed in the liver. A portion of the medicine is converted into morphine through an enzyme system known as CYP2D6 metabolism. This conversion to morphine helps enhance the pain-relieving effect by interacting with opioid receptors in the brain and spinal cord, which reduces the sensation of pain and helps control coughing.
Common Medical Uses of Codeine Phosphate
Healthcare professionals may prescribe codeine phosphate for several conditions, including:
- Relief of acute moderate pain
- Treatment of dry cough or painful cough
- Symptomatic management of diarrhoea in certain cases
Because it affects the central nervous system, codeine must be used carefully and according to recommended codeine dosage guidelines.
Available Forms of Codeine Phosphate
Codeine phosphate is available in several pharmaceutical forms depending on the intended use and dosing requirements:
- Codeine phosphate tablets: commonly prescribed for pain relief
- Codeine phosphate syrup: often used for cough suppression
- Codeine phosphate liquid: may be prescribed when flexible dosing is required
Each form is designed for oral administration and may vary in strength depending on the patient’s condition and treatment plan.
While codeine phosphate tablets such as Codeine Phosphate 30mg are typically used for pain management, liquid or syrup formulations may be preferred in cases involving cough or when precise dose adjustments are needed. Proper medical guidance is important to ensure safe and effective use.
Codeine Phosphate 30 mg Tablet Uses
Codeine phosphate tablets are commonly prescribed medicines used to manage several medical conditions, particularly those involving pain and persistent cough. As an opioid analgesic, codeine works by affecting the brain and nervous system to reduce pain signals and suppress certain reflexes such as coughing.
Because of these properties, codeine phosphate tablet uses extend beyond simple pain relief. When taken according to the recommended codeine dosage, the medicine can provide effective symptom control for a range of conditions.
Pain Relief
One of the primary codeine phosphate tablet uses is the treatment of acute moderate pain that cannot be adequately controlled with mild pain relievers such as paracetamol or ibuprofen. By interacting with opioid receptors in the brain, codeine helps reduce the perception of pain and improve comfort.
Codeine phosphate tablets may be prescribed for:
- Acute moderate pain caused by medical conditions or procedures
- Post-surgical pain during recovery after operations
- Injury-related pain, including muscle or tissue damage
In many cases, codeine phosphate 30mg tablets are used for short-term pain management under medical supervision to ensure safe and effective relief.
Cough Suppression
Another important use of codeine phosphate is as a cough suppressant. Codeine acts on the cough centre in the brain to reduce the urge to cough, which can be helpful in cases of persistent or painful coughing.
Healthcare providers may recommend codeine phosphate for:
- Dry cough that does not produce mucus
- Painful cough associated with irritation of the throat or airways
In some cases, codeine phosphate syrup or liquid formulations may also be used for cough control, particularly when flexible dosing is required.
Gastrointestinal Use
Codeine phosphate may also be used in certain situations to help manage diarrhoea. The medicine works by slowing the movement of the intestines, which can help reduce the frequency of bowel movements.
This gastrointestinal effect may help with:
- Short-term diarrhoea management
- Symptom control when other treatments are not suitable
Because codeine phosphate tablets affect the central nervous system and digestive system, they should always be used according to appropriate codeine phosphate dosage guidelines to minimise the risk of side effects or dependency.
Codeine Phosphate 30mg to 30mg Dosage Guide
The correct codeine phosphate dosage depends on several factors including the patient’s age, medical condition, and response to treatment. Codeine phosphate tablets should always be taken according to medical guidance to ensure effective pain relief while reducing the risk of opioid toxicity, dependence, or overdose.
Because codeine phosphate 30mg tablets are a relatively strong opioid pain medicine, careful attention to the recommended dose of codeine phosphate is essential.
For Adults
For adults experiencing acute moderate pain, the usual codeine phosphate dosage is taken at regular intervals as prescribed by a healthcare professional.
Typical adult dosing guidelines include:
- 30mg to 30mg taken every 4–6 hours if required
- Tablets are taken by oral administration with water
- The codeine phosphate max dose should not exceed 240mg per day
The exact dose of codeine phosphate may vary depending on the severity of pain and the patient’s response to treatment.
Children Aged 12–18 Years
For adolescents between 12 and 18 years of age, codeine phosphate may sometimes be used for pain relief when other treatments are ineffective.
General guidance may include:
- Lower doses compared with adults
- Careful monitoring for side effects
- Use only when recommended by a healthcare professional
Special caution is required because some individuals may metabolise codeine faster due to CYP2D6 metabolism, which can increase the risk of opioid toxicity.
Children Under 12 Years (Contraindicated)
Codeine phosphate tablets are contraindicated in children under 12 years of age.
This restriction exists because children may be at increased risk of respiratory depression and other serious complications if codeine is converted rapidly to morphine in the body.
Elderly Patients
Older adults may be more sensitive to the effects of codeine phosphate and may require adjusted dosing.
Important considerations include:
- Starting with lower doses
- Monitoring for confusion, somnolence, or hypotension
- Increased sensitivity to opioid analgesics
Healthcare providers may adjust the codeine phosphate dosage to reduce the risk of side effects in elderly patients.
Renal or Hepatic Impairment
Patients with kidney or liver impairment may process codeine more slowly, which can increase the risk of accumulation and side effects.
Dose adjustments may be required in patients with:
- Renal impairment
- Hepatic impairment
- Severe hepatic dysfunction
Medical supervision is important to ensure that the dose of codeine phosphate remains safe and effective in these situations.
Common Side Effects of Codeine Phosphate

Like many opioid analgesic medicines, codeine phosphate tablets may cause side effects in some individuals. Most side effects are usually mild and temporary when the medicine is taken according to the recommended codeine phosphate dosage. However, because codeine affects the central nervous system, it is important to be aware of possible reactions and recognise signs of opioid toxicity or codeine phosphate overdose.
Patients should follow the recommended dose of codeine phosphate and seek medical advice if unusual symptoms occur during treatment.
Common Side Effects
Some people taking codeine phosphate 30mg tablets may experience mild side effects as the body adjusts to the medication. These effects are generally related to the way opioids act on the nervous system and digestive system.
Common side effects may include:
- Nausea
- Vomiting
- Constipation
- Loss of appetite
- Somnolence (drowsiness or excessive sleepiness)
These symptoms are usually manageable and may improve as the body becomes accustomed to the medication. Drinking plenty of fluids, maintaining a balanced diet, and following the prescribed codeine dosage may help reduce some of these effects.
Signs of Opioid Toxicity
In some situations, particularly if the codeine phosphate max dose is exceeded or if a person metabolises the drug rapidly through CYP2D6 metabolism, more serious symptoms may occur. These symptoms can indicate opioid toxicity or a potential codeine phosphate overdose, which requires immediate medical attention.
Warning signs may include:
- Confusion or unusual mental changes
- Shallow or slow breathing
- Constricted pupils
- Respiratory depression
- Circulatory depression
Because codeine phosphate is converted to morphine in the body, individuals who are CYP2D6 ultra-rapid metabolisers may experience stronger opioid effects, increasing the risk of toxicity.
If symptoms of opioid toxicity or codeine phosphate overdose appear, medical help should be sought immediately. Careful adherence to recommended codeine phosphate dosage guidelines helps reduce the risk of these serious side effects.
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If you are looking for a reliable option to manage acute moderate pain, Codeine Phosphate 30mg Tablets BP offer an effective solution when taken according to recommended codeine phosphate dosage guidelines. As a recognised opioid analgesic, codeine phosphate tablets are commonly used to provide short-term pain relief when standard pain medications are not sufficient.
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Frequently Asked Questions About Codeine Phosphate
What is codeine phosphate?
Codeine phosphate is a medicine belonging to the group of drugs known as opioid analgesics. It is commonly used to relieve acute moderate pain when standard pain relief medicines are not strong enough. Codeine works by acting on the central nervous system to reduce the way the body senses pain.
After oral administration, codeine phosphate is absorbed into the bloodstream and processed in the liver. Through CYP2D6 metabolism, part of the medicine is converted to morphine, which interacts with opioid receptors in the brain and spinal cord to provide pain relief and may also help suppress coughing.
Codeine phosphate tablets are also sometimes used to help control dry cough, painful cough, and diarrhoea under appropriate medical guidance.
What is in codeine phosphate?
The main active ingredient in codeine phosphate tablets is codeine phosphate, a pharmaceutical compound derived from codeine. It belongs to the opioid class of medicines used for pain relief and cough suppression.
A typical codeine phosphate tablet contains:
Active ingredient: Codeine phosphate, commonly 30 mg or 60 mg per tablet
Inactive ingredients: Standard tablet excipients used to stabilise the medicine and support tablet formation
The exact composition of inactive ingredients may vary depending on the manufacturer, but the primary therapeutic component responsible for pain relief is codeine phosphate.
What are codeine phosphate tablets used for?
Codeine phosphate tablets are primarily used to treat acute moderate pain when other pain relief medicines do not provide sufficient relief. As an opioid analgesic, codeine helps reduce pain by acting on opioid receptors in the brain and nervous system.
Common codeine phosphate tablet uses include:
Treatment of acute moderate pain
Management of post-surgical or injury-related pain
Relief of dry cough or painful cough
Symptomatic management of diarrhoea in certain cases
Because codeine phosphate pills affect the central nervous system, they should always be taken according to recommended medical guidance to ensure safe and effective treatment.
Is codeine phosphate an opioid?
Yes. Codeine phosphate belongs to the opioid analgesic group of medicines. Opioids can help reduce pain, but they can also cause side effects such as drowsiness, constipation, nausea, dizziness, dependence, withdrawal symptoms, and serious breathing problems if used incorrectly.
Because it is an opioid medicine, codeine phosphate should only be used as directed by a healthcare professional.
How does codeine phosphate work?
After oral administration, codeine phosphate is absorbed into the bloodstream and processed in the liver. Part of the medicine is converted through CYP2D6 metabolism into morphine.
This active effect interacts with opioid receptors in the brain and spinal cord. As a result, it helps reduce pain signals and may also help suppress coughing in selected medical situations.
Why does codeine phosphate not work the same for everyone?
Codeine depends partly on liver metabolism. Some people convert codeine poorly and may get little pain relief. Others may convert it too quickly, which can increase the risk of stronger opioid effects and toxicity.
This is why medical guidance is important before using codeine phosphate, especially for people with other health conditions, liver problems, kidney problems, or sensitivity to opioid medicines.
What is the difference between codeine phosphate and combination codeine tablets?
Codeine phosphate may refer to a codeine-only medicine, depending on the product. Combination codeine medicines, such as codeine with paracetamol or acetaminophen, contain more than one active ingredient.
This difference matters because taking extra paracetamol or acetaminophen by mistake can be dangerous. Users should always check the medicine label and speak with a pharmacist or doctor before combining medicines.
Is codeine phosphate the same as Tylenol 3?
No. Tylenol 3 contains codeine plus acetaminophen. Codeine phosphate may be a codeine-only medicine depending on the product.
This is an important difference because combination products contain more than one active ingredient. Taking extra acetaminophen or paracetamol without checking the product label can increase the risk of harm.
How long does codeine stay in your system?
The amount of time codeine phosphate stays in the body can vary depending on factors such as metabolism, age, liver function, health conditions, and dosage. On average, codeine has a half-life of around 3–4 hours, meaning the body gradually eliminates the drug over several hours.
However, small amounts of codeine or its metabolites may remain detectable in the body for longer periods:
Blood: approximately 24 hours
Urine: up to 48 hours or longer in some cases
Saliva: up to 1–2 days
Individual differences in CYP2D6 metabolism, health conditions, and the codeine phosphate dosage taken can influence how quickly the drug is processed and cleared from the body.
What is the dose of codeine phosphate?
The recommended dose of codeine phosphate depends on the patient’s age, condition being treated, medical history, and response to the medicine. The exact codeine phosphate dosage should always follow professional medical advice to reduce the risk of side effects, opioid toxicity, dependence, or overdose.
For adults with acute moderate pain, typical dosing guidance may include:
30 mg to 60 mg taken every 4–6 hours if needed
The maximum daily dose of codeine phosphate should generally not exceed 240mg per day
Dose adjustments may be required for elderly patients or individuals with renal or hepatic impairment. Codeine phosphate should not be taken in higher amounts or for longer than advised.
Can codeine phosphate make you sleepy?
Yes. Drowsiness, somnolence, tiredness, dizziness, and slower reactions are common effects of codeine. Some people may feel very sleepy, especially when starting treatment or if the dose is changed.
People taking codeine should avoid driving, cycling, operating machinery, or doing risky tasks if they feel sleepy, dizzy, confused, or less alert.
Can you drive after taking codeine phosphate?
You should not drive, cycle, operate machinery, or do risky tasks if codeine phosphate makes you sleepy, dizzy, confused, or less alert. Codeine can slow reaction time and affect judgement.
The safest approach is to understand how codeine affects you first and follow medical or pharmacist guidance before driving or doing any safety-sensitive activity.
What are the common side effects of codeine phosphate?
Common side effects may include nausea, vomiting, constipation, loss of appetite, drowsiness, dizziness, tiredness, sweating, dry mouth, and confusion.
These effects can vary between individuals. Medical advice is needed if side effects become severe, persistent, unusual, or difficult to manage.
Why does codeine phosphate cause constipation?
Codeine can slow movement in the digestive system. This can make stools harder to pass and may lead to constipation.
If constipation becomes painful, severe, or difficult to manage, a doctor or pharmacist should be consulted. Constipation should not be ignored, especially if it becomes persistent.
Can codeine phosphate cause an allergic reaction?
Yes. Some people may have an allergic reaction to codeine. Warning signs can include hives, rash, itching, swelling, throat tightness, breathing difficulty, or feeling faint.
Severe allergy symptoms should be treated as urgent and require immediate medical attention.
What are the serious warning signs after taking codeine phosphate?
Serious warning signs include shallow or slow breathing, extreme sleepiness, confusion, difficulty waking, constricted pupils, circulatory depression, severe dizziness, swelling of the face or throat, or symptoms of overdose.
These symptoms require immediate medical help. Breathing problems, collapse, severe allergy symptoms, or suspected overdose should be treated as urgent.
Can codeine phosphate cause breathing problems?
Yes. Respiratory depression is one of the most serious risks of codeine. The risk may increase if the dose is exceeded, if codeine is combined with alcohol or sedatives, or if a person metabolises codeine rapidly through CYP2D6.
Slow, shallow, or difficult breathing after taking codeine phosphate needs immediate medical attention.
Can codeine phosphate be addictive?
Yes. Codeine can cause tolerance, dependence, addiction, and withdrawal symptoms. The risk increases when it is used for longer than advised, taken in higher amounts than directed, or used for reasons other than prescribed.
Because of this risk, codeine phosphate should be used only as directed and for the shortest appropriate time under medical guidance.
What happens if you stop codeine phosphate suddenly?
Stopping codeine suddenly after repeated or long-term use may cause withdrawal symptoms. These can include anxiety, sweating, sleep problems, shaking, stomach upset, muscle aches, or feeling unwell.
People who have used codeine regularly should seek medical guidance before stopping, especially if they have taken it for an extended period.
What should you avoid while taking codeine phosphate?
Avoid alcohol, benzodiazepines, sleeping pills, sedatives, other opioids, and medicines that cause heavy drowsiness unless a doctor has specifically approved the combination.
These substances can increase the risk of severe sedation, breathing problems, coma, or overdose.
Can codeine phosphate be taken with paracetamol or acetaminophen?
It depends on the product. Some codeine medicines already contain paracetamol or acetaminophen. Taking additional paracetamol or acetaminophen without checking the ingredients can be dangerous.
Always check the medicine label and ask a pharmacist or doctor before combining medicines.
Is codeine phosphate safe for children?
The supplied research highlights that codeine phosphate is contraindicated in children under 12 years of age and requires special caution in adolescents.
Children may be more vulnerable to serious side effects, including breathing problems, especially if codeine is rapidly converted to morphine in the body.
Is codeine phosphate safe during pregnancy or breastfeeding?
Pregnancy and breastfeeding are high-risk situations for codeine use. Codeine can affect babies, and it may pass into breast milk.
Pregnant or breastfeeding patients should only discuss codeine use with a qualified healthcare professional.
What should you do with old or unused codeine phosphate tablets?
Do not use old, unidentified, or expired codeine tablets. Do not keep unused codeine “just in case,” and do not share it with anyone.
The safer option is to return unused opioid medicine to a pharmacy or approved medicine disposal service.
Why should you not use someone else’s codeine phosphate?
Codeine prescribed for one person may be unsafe for another person. People process codeine differently, and health conditions or other medicines can increase the risk.
Sharing or using someone else’s opioid medicine can cause serious harm and may be illegal.
When should you contact a doctor about codeine phosphate?
Contact a doctor or pharmacist if codeine is not helping, side effects are hard to manage, constipation becomes severe, you feel unusually sleepy or confused, you are worried about dependence, or you have used it longer than advised.
Seek urgent help for breathing problems, severe allergy symptoms, collapse, or suspected overdose.




