Paracetamol Tablets Bp 500mg
SUMMARY OF PRODUCT CHARACTERISTICS
1 NAME OF THE MEDICINAL PRODUCT
Paracetamol Tablets B.P. 500mg Paracetamol 500mg Tablets
2 QUALITATIVE AND QUANTITATIVE COMPOSITION
Paracetamol 500mg
For the full list of excipients, see section 6.1
3 PHARMACEUTICAL FORM
Tablet
White capsule shaped tablet debossed “PARA 500” with a break line
4 CLINICAL PARTICULARS
4.1 Therapeutic indications
Analgesic and antipyretic, mild to moderate pain including headache, toothache, rheumatic pains, period pains, colds and influenza symptoms
4.2 Posology and method of administration
Adults and children over 12 years:
1-2 tablets to be swallowed every 4-6 hours. Do not exceed 4 doses (8 tablets) in 24 hours.
Children 6 to 12 years:
Half to one tablet every 4-6 hours. Do not exceed 4 doses (4 tablets) in 24 hours.
The tablets should be given to children below the age of 6 only as directed by a doctor.
Under no circumstances must the daily dose of paracetamol exceed four grams in 24 hours.
4.3 Contraindications
Hypersensitivity to the active substance or to any of the excipients listed in section 6.1.
4.4 Special warnings and precautions for use
Care is advised in the administration of paracetamol to patients with severe renal or severe hepatic impairment. The hazards of overdose are greater in those with noncirrhotic alcohol disease.
Do not take more medicine than the label tells you to. If you do not get better, talk to your doctor.
Contains Paracetamol.
Do not take anything else containing paracetamol while taking this medicine
Talk to your doctor at once if you take too much of this medicine, even if you feel well. This is because too much paracetamol can cause delayed, serious liver damage.
Patients should be advised that paracetamol may cause severe skin reactions. If a skin reaction such as skin reddening, blisters, or rash occurs, they should stop use and seek medical assistance right away.
4.5 Interaction with other medicinal products and other forms of interaction
Cholestyramine: The speed of absorption of paracetamol is reduced by cholestyramine. Therefore, the cholestyramine should not be taken within one hour if maximal analgesia is required.
Metoclopramide and Domperidone: The absorption of paracetamol is increased by metoclopramide and domperidone. However, concurrent use need not be avoided.
Warfarin: The anticoagulant effect of warfarin and other coumarins may be enhanced by prolonged regular use of paracetamol with increased risk of bleeding; occasional doses have no significant effect.
Chloramphenicol: Increased plasma concentration of chloramphenicol.
4.6. Fertility, pregnancy and lactation
Pregnancy
Epidemiological studies in human pregnancy have shown no ill effects due to Paracetamol used in the recommended dosage, but patients should follow the advice of their doctor.
Breast-feeding
Paracetamol is excreted in breast milk but not in a clinically significant amount. Available published data do not contraindicate breast-feeding.
4.7 Effects on ability to drive and use machines
None
4.8. Undesirable Effects
Adverse effects of Paracetamol are rare. Very rare cases of serious skin reactions have been reported. There have been reports of blood dyscrasias including thrombocytopenia purpura, methaemoglobenaemia and agranulocytosis, but these were not necessarily causally related to Paracetamol.
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 Yellow Card Scheme at: www.mhra.gov.uk/yellowcard.
4.9 Overdose
Liver damage is possible in adults who have taken 10g or more of paracetamol. . Ingestion of 5g or more of paracetamol may lead to liver damage if the patient has risk factors (see below).
Risk Factors If the patient
a) Is on long term treatment with carbamazepine, phenobarbitone, phenytoin, primidone, rifampicin, St John's Wort or other drugs that induce liver enzymes.
Or
b) Regularly consumes ethanol in excess of recommended amounts.
Or
c) Is likely to be glutathione deplete e.g. eating disorders, cystic fibrosis, HIV infection, starvation, cachexia.
Symptoms
Symptoms of paracetamol overdose in the first 24 hours are pallor, nausea, vomiting, anorexia and abdominal pain. Liver damage may become apparent 12 to 48 hours after ingestion. Abnormalities of glucose metabolism and metabolic acidosis may occur. In severe poisoning hepatic failure may progress to encephalopathy, haemorrhage, hypoglycaemia, cerebral oedema and death. Acute renal failure with acute tubular necrosis, strongly suggested by loin pain, haematuria and proteinuria, may develop even in the absence of severe liver damage. Cardiac arrhythmias and pancreatitis have been reported.
Management
Immediate treatment is essential in the management of paracetamol overdose. Despite a lack of significant early symptoms patients should be referred to hospital urgently for immediate medical attention. Symptoms may be limited to nausea or vomiting and may not reflect the severity of overdose or the risk of organ damage. Management should be in accordance with established treatment guidelines, see BNF overdose section.
Treatment with activated charcoal should be considered if the overdose has been taken within 1 hour. Plasma paracetamol concentration should be measured at 4 hours or later after ingestion (earlier concentrations are unreliable).
Treatment with N-acetylcysteine may be used up to 24 hours after ingestion of paracetamol however, the maximum protective effect is obtained up to 8 hours post ingestion.
If required the patient should be given intravenous-N-acetylcysteine, in line with the established dosage schedule. If vomiting is not a problem, oral methionine may be a suitable alternative for remote areas, outside hospital. Management of patients who present with serious hepatic dysfunction beyond 24 hours from ingestion should be discussed with the NPIS or a liver unit.
5. PHARMACOLOGICAL PROPERTIES
5.1. Pharmacodynamic Properties
Pharmacotherapeutic group: Analides, Other Analgesics and Antipyretics. ATC Code: N02B E01
Mechanism of action
Analgesic - the mechanism of analgesic action has not been fully determined. Paracetamol may act predominantly by inhibiting prostaglandin synthesis in the central nervous system (CNS) and to a lesser extent, through a peripheral action by blocking pain-impulse generation.
The peripheral action may also be due to inhibition of prostaglandin synthesis or to inhibition of the synthesis or actions of other substances that sensitise pain receptors to mechanical or chemical stimulation.
Antipyretic - paracetamol probably produces antipyresis by acting centrally on the hypothalamic heat-regulation centre to produce peripheral vasodilation resulting in increased blood flow through the skin, sweating and heat loss. The central action probably involves inhibition of prostaglandin synthesis in the hypothalamus
5.2 Pharmacokinetic properties
Absorption and Fate
Paracetamol is readily absorbed from the gastro-intestinal tract with peak plasma concentrations occurring about 30 minutes to 2 hours after ingestion.
It is metabolized in the liver and excreted in the urine mainly as the sulphate and glucuronide conjugates.
Less than 5% is excreted unchanged paracetamol. The elimination half-life varies from about 1 to 4 hours.
Plasma protein binding is negligible at usual therapeutic concentrations but increases with increasing concentrations.
A minor hydroxylated metabolite which is usually produced in very small amounts by mixed-function oxidases in the liver and which is usually detoxified by conjugation with liver glutathione may accumulate following paracetamol overdosage and cause liver damage
5.3 Preclinical safety data
None stated
6 PHARMACEUTICAL PARTICULARS
6.1 List of excipients
Maize Starch, Sodium Metabisulphate, Magnesium Stearate, Colloidal Anhydrous Silica
6.2 Incompatibilities
Not applicable
6.3 Shelf life
3 years.
6.4 Special precautions for storage
Do not store above 25°C. Store in the original container.
6.5 Nature and contents of container
Opaque blister packs comprised of 250 micron rigid opaque PVC and 20 micron hard tempered aluminum foil.
Pack sizes: 16, 24, 25, 32, 48, 50, 96, 100
6.6 Special precautions for disposal
Not applicable
7 MARKETING AUTHORISATION HOLDER
Medley Pharma Limited Unit 2A,
Olympic Way Sefton Business Park Liverpool L30 1RD UK
8 MARKETING AUTHORISATION NUMBER(S)
PL 43870/0009
9 DATE OF FIRST AUTHORISATION/RENEWAL OF THE
AUTHORISATION
07/07/2004 / 19/03/2009
10 DATE OF REVISION OF THE TEXT
22/07/2016