PARACETAMOL VIATRIS 1 g Scored Tablet Bottle/8

Scored tablet.

Paracetamol.........................................................................................................................................................1 g

For one tablet.

Excipients:

Symptomatic treatment of mild to moderate pain and/or fever.

Adults and children from 50 kg (approximately 15 years).

Dosage

Warning: this presentation contains 1000 mg (1 g) of paracetamol per tablet: do not take 2 tablets at a time.

Use the lowest effective dose for the shortest possible duration. Use the dose of 1000 mg for pain and/or fever not relieved by a dose of 500 mg of paracetamol.

Recommended dosage: approximately 60 mg/kg/day to be divided into several doses without exceeding the maximum dose indicated in the table below.

The approximate age according to weight is given for information only.

Weight (Approximate age)	Maximum dose per administration	Interval of administration	Maximum daily dose
Adults and children from 50 kg (approximately 15 years)	1000 mg, i.e. 1 g (1 tablet)	at least 4 hours	3000 mg per day, i.e. 3 g (3 tablets)

Warning: Take into account all medicines containing paracetamol to avoid overdose, including those obtained without a prescription.

Only on medical advice and in the absence of concomitant risk factors, the dose may be increased up to 4000 mg (4 g) per day, i.e. 4 tablets per day, in patients weighing at least 50 kg (approximately 15 years).

Special populations

The maximum daily dose must not exceed 60 mg/kg/day nor 3000 mg per day (3 g/day) in the following situations:

• adults weighing less than 50 kg,

• in case of low reserves or deficiency of hepatic glutathione (e.g., chronic malnutrition, fasting, recent weight loss, anorexia, cachexia),

• dehydration.

Hepatic insufficiency (mild to moderate), chronic alcoholism and Gilbert's syndrome (familial non-haemolytic jaundice)

It is recommended to reduce the dose and increase the minimum interval between two doses. The daily dose of paracetamol must not exceed 2000 mg/day (2 g/day).

Renal impairment

In cases of renal impairment and unless medically advised, it is recommended to reduce the maximum daily dose and increase the minimum interval between 2 doses as shown in the table below.

Adults:

Creatinine clearance	Administration interval	Maximum daily dose
10-50 mL/min	at least 6 hours	3000 mg/day (3 g/day)
< 10 mL/min	at least 8 hours	2000 mg/day (2 g/day)

Elderly

Clinical experience indicates that the recommended dosage is generally adequate in adults. However, concomitant risk factors, some of which occur more frequently in elderly subjects and which require dose adjustment, should be taken into account.

Method of administration

Oral use.

If needed, after breaking it in half, the tablet is to be swallowed as is with a glass of water.

Duration of treatment

Frequent or prolonged use without medical supervision is not recommended.

If symptoms persist beyond 5 days in the case of pain or 3 days in the case of fever, if symptoms worsen or if new symptoms appear, the treatment should be re-evaluated.

• Hypersensitivity to paracetamol or to any of the excipients mentioned in section Composition.

• Severe hepatic impairment.

Due to the unit dose of paracetamol per tablet (1000 mg, i.e. 1 g), this presentation is not suitable for children weighing less than 50 kg.

Patients must be informed that they must not take other medicines containing paracetamol. Taking several doses at one administration may seriously damage the liver; if this occurs, the patient must immediately call a doctor.

In a child treated with 60 mg/kg/day of paracetamol, combining another antipyretic is justified only in case of ineffectiveness.

In case of acute viral hepatitis, treatment should be stopped.

Precautions for use

Paracetamol must be administered with caution in the following situations (see section Dosage and administration) :

• adults weighing less than 50 kg,

• mild to moderate hepatic insufficiency,

• chronic alcoholism and recent withdrawal,

• renal failure,

• Gilbert's syndrome,

• concomitant treatment with medicines affecting liver function (e.g. potentially hepatotoxic medicines, cytochrome P450 enzyme-inducing medicines such as phenobarbital, phenytoin, carbamazepine, topiramate, rifampicin),

• Glucose‑6‑Phosphate Dehydrogenase (G6PD) deficiency (which may lead to haemolytic anaemia),

• dehydration,

• in case of low reserves or deficiency of hepatic glutathione (e.g., chronic malnutrition, fasting, recent weight loss, anorexia, cachexia),

• elderly people.

Consumption of alcoholic beverages during treatment is not recommended.

In case of long-term use, high doses, or incorrect use of analgesics in patients with chronic headaches, headaches may appear or worsen; they should not be treated with higher doses of this medicine. In such cases, use of analgesics should be discontinued on medical advice.

Cases of high anion gap metabolic acidosis (HAGMA) due to pyroglutamic acidosis have been reported in patients with serious illness such as severe renal failure and sepsis, or in patients suffering from malnutrition or other sources of glutathione deficiency (for example, chronic alcoholism) who have been treated with paracetamol at a therapeutic dose for a prolonged period, or with a combination of paracetamol and flucloxacillin. In case of suspected HAGMA due to pyroglutamic acidosis, it is recommended to immediately discontinue paracetamol and carry out close monitoring. Measurement of urinary 5‑oxoproline may be useful to identify pyroglutamic acidosis as the underlying cause of HAGMA in patients presenting with multiple risk factors.

Associations requiring precautions for use

+ Vitamin K antagonists

Risk of increased effect of vitamin K antagonists and of bleeding risk in case of paracetamol intake at maximum doses (4 g/day) for at least 4 days.

More frequent INR monitoring. Possible adjustment of the vitamin K antagonist dose during paracetamol treatment and after its discontinuation.

+ Flucloxacillin

Precautions must be taken when paracetamol is used at the same time as flucloxacillin, as concomitant intake has been associated with high anion gap metabolic acidosis due to pyroglutamic acidosis, particularly in patients with risk factors (see section Warnings and precautions).

Interactions with paraclinical tests

Taking paracetamol may distort the glucose measurement by the glucose oxidase-peroxidase method in cases of abnormally high concentrations.

Taking paracetamol may distort the measurement of blood uric acid by the phosphotungstic acid method.

Pregnancy

Studies carried out in animals have not demonstrated a teratogenic or foetotoxic effect of paracetamol.

A large amount of data on pregnant women demonstrates the absence of any malformation or any fetal/neonatal toxicity. Epidemiological studies on the neurodevelopment of children exposed to paracetamol in utero produce inconclusive results. If clinically necessary, paracetamol may be used during pregnancy; however, it should be used at the lowest effective dose, for the shortest possible duration and at the lowest possible frequency.

Breast-feeding

After administration, paracetamol is excreted in small quantities in breast milk. At therapeutic doses, administration of this medicine is possible during breastfeeding.

Fertility

Due to the potential mechanism of action on cyclo-oxygenases and prostaglandin synthesis, paracetamol could impair fertility in women, through an effect on ovulation that is reversible upon discontinuation of treatment.

Effects on male fertility have been observed in an animal study. The relevance of these effects in humans is not known.

Paracetamol has no or negligible effect on the ability to drive vehicles and use machines.

Undesirable effects are classified by system organ class. Their frequencies are defined as follows:

• Very common (≥ 1/10)

• Common (≥ 1/100 to < 1/10)

• Uncommon (≥ 1/1 000 to < 1/100)

• Rare (≥ 1/10 000 to < 1/1 000)

• Very rare (< 1/10 000)

• Frequency not known (cannot be estimated from the available data)

Blood and lymphatic system disorders

• Very rare: thrombocytopenia, leukopenia and neutropenia.

Immune system disorders

• Rare: hypersensitivity reactions;

• Frequency not known: anaphylactic reaction (including hypotension), anaphylactic shock, angioedema (Quincke's edema).

Their occurrence requires immediate and permanent discontinuation of this medicine and related medicines.

Respiratory, thoracic and mediastinal disorders

• Frequency not known: bronchospasm (cases of bronchospasm have been identified with paracetamol, mainly in asthmatic patients sensitive to aspirin or other non-steroidal anti-inflammatory drugs).

Metabolism and nutrition disorders

• Frequency not known: metabolic acidosis with high anion gap.

Description of selected adverse reactions

High anion gap metabolic acidosis

Cases of high anion gap metabolic acidosis due to pyroglutamic acidosis have been observed in patients with risk factors taking paracetamol (see section Warnings and precautions). Pyroglutamic acidosis may occur in these patients due to low glutathione levels.

Gastrointestinal disorders

• Frequency undetermined: diarrhoea, abdominal pain.

Hepatobiliary disorders

• Frequency undetermined: increased liver enzymes.

Skin and subcutaneous tissue disorders

• Rare: erythema, urticaria, skin rash. Their occurrence requires immediate and permanent discontinuation of this medicine and of related medicines;

• Rare: purpura. The occurrence of this effect requires immediate discontinuation of this medicine. The medicine may be reintroduced only on medical advice;

• Very rare: serious skin reactions. Their occurrence requires immediate and permanent discontinuation of this medicine and of related medicines;

• Frequency not known: fixed pigmented erythema.

Reporting of suspected adverse reactions

Reporting suspected adverse reactions after authorisation of the medicinal product is important. It allows continued monitoring of the benefit/risk balance of the medicinal product. Healthcare professionals are asked to report any suspected adverse reactions via the national reporting system: National Agency for the Safety of Medicines and Health Products (ANSM) and the network of Regional Pharmacovigilance Centres - Website: https://signalement.social-sante.gouv.fr/.

The risk of serious poisoning (therapeutic overdose or accidental poisoning) may be particularly high in elderly subjects, in young children, in patients with liver impairment, in cases of chronic alcoholism, in patients suffering from chronic malnutrition (see section Dosage and administration), fasting, recent weight loss, familial cholemia (Gilbert's syndrome), as well as patients receiving enzyme-inducing medicines. In these cases, poisoning may be fatal.

Symptoms

Nausea, vomiting, anorexia, pallor, malaise, sweating, abdominal pain generally appear within 24 first hours.

An overdose may cause hepatic cytolysis, which may lead to hepatocellular failure which may require liver transplantation, gastrointestinal bleeding, metabolic acidosis, encephalopathy which may progress to coma and death.

Cases of disseminated intravascular coagulation have been observed in the context of paracetamol overdose.

Simultaneously, an increase in hepatic transaminases, lactate dehydrogenase, bilirubin and a decrease in prothrombin level may be seen 12 to 48 hours after ingestion. The clinical signs of hepatic damage are generally observed after 1 to 2 days, and reach a maximum after 3 to 4 days.

Overdose may also lead to acute pancreatitis, hyperamylasemia, acute renal failure and pancytopenia.

Emergency management

• Discontinue treatment.

• Immediate transfer to a hospital setting for emergency medical care, despite the absence of significant early symptoms.

• Rapid evacuation of the ingested product, by aspiration and gastric lavage, preferably within 4 hours following ingestion.

• Blood sample to perform the initial plasma paracetamol assay. The plasma paracetamol concentration must be measured at least 4 hours after ingestion (an assay performed earlier is not reliable).

• Management of overdose classically involves administration of the antidote N-acetylcysteine as early as possible by intravenous route or by oral route if possible, before the tenth hour. Although less effective, a protective effect of the antidote may be obtained up to 48 hours post-ingestion. In this case the antidote must be administered for a longer period.

• Symptomatic treatment.

• Liver tests must be performed at the start of treatment and repeated every 24 hours. In most cases, hepatic transaminases return to normal within 1 to 2 weeks with full restoration of liver function. However, in very severe cases, liver transplantation may be necessary.

• Further measures will depend on the severity, nature and course of the clinical symptoms of paracetamol poisoning and should follow standard intensive care protocols.

Pharmacotherapeutic class: OTHER ANALGESICS and ANTIPYRETICS-ANILIDES, ATC code: N02BE01.

Paracetamol has a central and peripheral mechanism of action.

Absorption

Oral absorption of paracetamol is complete and rapid. Maximum plasma concentrations are reached 30 to 60 minutes after ingestion.

Distribution

Paracetamol is rapidly distributed in all tissues. Concentrations are comparable in blood, saliva and plasma. Binding to plasma proteins is low.

Biotransformation

Paracetamol is metabolised mainly in the liver. The 2 major metabolic pathways are glucuronidation and sulfoconjugation. The latter pathway is rapidly saturable at doses above therapeutic doses. A minor pathway, catalysed by cytochrome P450, is the formation of a reactive intermediate (N-acetyl benzoquinone imine), which under normal conditions of use is rapidly detoxified by reduced glutathione and eliminated in the urine after conjugation with cysteine and mercapturic acid. In contrast, during massive overdoses, the quantity of this toxic metabolite is increased.

Elimination

Elimination is mainly urinary. 90 % of the ingested dose is eliminated by the kidney in 24 hours, mainly in glucuronide conjugated form (60 to 80 %) and sulfate conjugated form (20 to 30 %).

Less than 5% is eliminated unchanged.

The elimination half-life is approximately 2 hours.

Pathophysiological variations

Renal impairment : in cases of renal impairment (see section Dosage and administration), the elimination of paracetamol and its metabolites is delayed.

Hepatic impairment : in case of hepatic impairment, the metabolism of paracetamol is altered, with a consequent increase in plasma concentrations of paracetamol and a prolongation of the elimination half-life (see section Dosage and administration).

Elderly subject : the conjugation capacity is not modified (see section Dosage and administration).

No conventional study based on currently accepted standards for assessing reproductive and developmental toxicity is available.

3 years.

No special precautions for storage.

No special requirements.

Marketing authorisation (AMM)

CIP 3400938198294 (Plq/8). CIP 3400930040669 (Fl/8). CIP 3400955014751 (Fl/80).

Price:

1,16 euros (Plq/8). 1,16 euros (Fl/8).

Remb Séc soc at 65% (Plq/8).
Remb Séc soc at 65% (Fl/8) in the indications:

• Indication(s) appearing in the AMM at the publication date of this order (Fl/8)

Hospital model(s) (Fl/80).
Collection.