- phenylephrine hydrochloride
GSL: General Sales List
This information is intended for use by health professionals
|Paracetamol Caffeine Phenylephrine Hydrochloride||500 25 6.1|
Route of administration: Oral
Swallow whole with water. Do not chew.
For all indications:
Adults, the elderly and children aged 16 years and over:
Two capsules every 4 to 6 hours when necessary to a maximum of 8 capsules (4 doses) in 24 hours.
Leave at least 4 to 6 hours between doses.
Do not take more than 8 capsules (4 doses) in any 24 hours.
Dosage should not be continued for longer than 3 days without consulting a doctor.
Children under 16 years:
Not to be used unless recommended by a doctor.
|Paracetamol:||Hypersensitivity to paracetamol or any of the other constituents.|
|Caffeine:||Should be given with care to patients with a history of peptic ulcer.|
|Phenylephrine Hydrochloride:||Severe coronary heart disease and cardiovascular disorders. Hypertension. Hyperthyroidism. Contraindicated in patients currently receiving or within two weeks of stopping therapy with monoamine oxidase inhibitors.|
Do not take anything else containing paracetamol while taking this medicine.
Talk to a doctor at once if you take too much of this medicine, even if you feel well.
Do not take more medicine than the label tells you to. If you do not get better, talk to your doctor.
- Keep out of the sight and reach of children.
The Label shall say:
Talk to a doctor at once if you take much of this medicine, even if you feel well.
The Leaflet shall say:
Talk to a 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. Go to your nearest hospital casualty department. Take your medicine and this leaflet with you.If you are pregnant or being prescribed medicine by your doctor, seek your doctor's advice before taking this product.
|Monoamine oxidase inhibitors (including moclobemide)||Hypertensive interactions occur between sympathomimetic amines such as phenylephrine and monoamine Oxidase inhibitors (see contraindications).|
|Sympathomimetic amines||Concomitant use of phenylephrine with other sympathomimetics amines can increase the risk of cardiovascular side effects (see warnings and precautions).|
|Beta-blockers and other antihypertensives (including debrisoquine, guanethidine, reserpine, methyldopa)||Phenylephrine may reduce the efficacy of beta-blocking drugs and antihypertensive drugs. The risk of hypertension and other cardiovascular side effects may be increased (see contraindications).|
|Tricyclic antidepressants (eg amitriptyline)||May increase the risk of cardiovascular side effects with phenylephrine (see contraindications)|
|Digoxin and cardiac glycosides||Concomitant use of phenylephrine with digoxin or cardiac glycosides may increase the risk of irregular heartbeat or heart attack|
|Ergot alkaloids||(ergotamine and methylsergide) increased risk of ergotism|
|Warfarin and other coumarins||The anticoagulant effect of warfarin and other coumarins may be enhanced by prolonged regular daily use of paracetamol with an increased risk of bleeding; occasional doses have no significant effect.|
PARACETAMOLThe speed of absorption of paracetamol may be increased by metoclopramide or domperidone and absorption reduced by colestyramine.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.Drugs which induce hepatic microsomal enzymes, such as alcohol, barbiturates, monoamine oxidase inhibitors and tricyclic antidepressants, may increase the hepatotoxicity of paracetamol, particularly after overdosage. Contraindicated in patients currently receiving or within two weeks of stopping therapy with monoamine oxidase inhibitors because of a risk of hypertensive crisis.
PHENYLEPHRINE HYDROCHLORIDEPhenylephrine may adversely interact with other sympathomimetics, vasodilators and beta blockers.
ParacetamolEpidemiological 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 regarding its use.Paracetamol is excreted in breast milk but not in a clinically significant amount. Available published data do not contraindicate breast feeding.
CaffeineTaken during pregnancy, it appears that the half-life of caffeine is prolonged. This is a possible contributing factor in hyperemesis gravidarum (morning sickness).Caffeine appears in breast milk. Irritability and poor sleeping pattern in the infant have been reported.
Phenylephrine HydrochlorideDue to the vasoconstrictive properties of phenylephrine the product should be used with caution in patients with a history of pre-eclampsia. Phenylephrine may reduce placental perfusion and the product should be used in pregnancy only if the benefits outweigh this risk. There is no information on use in lactation.
|Body System||Undesirable effect|
|Blood and lymphatic system disorders||Thrombocytopenia Agranulocytosis These are not necessarily causally related to paracetamol.|
|Immune system disorders||Anaphylaxis Cutaneous hypersensitivity reactions including skin rashes, angiodema and Stevens Johnson syndrome, toxic epidermal necrolysis|
|Respiratory, thoracic and mediastinal disorders||Bromchospasm*|
|Hepatobiliary disorders||Hepatic dysfunction|
CaffeineAdverse reactions identified through post-marketing use with caffeine are listed below. The frequency of these reactions is unknown.
|Central Nervous system||Nervousness and anxiety Irritability, Restlessness and Excitability Dizziness|
PhenylephrineThe following adverse events have been observed in clinical trials with phenylephrine and may therefore represent the most commonly occurring adverse events.
|Body System||Undesirable effect|
|Nervous system disorders||Headache, dizziness, insomnia|
|Cardiac disorders||Increased blood pressure|
|Gastrointestinal disorders||Nausea, vomiting, diarrhoea|
|Eye disorders||Mydriasis, acute angle closure glaucoma, most likely to occur in those with closed angle glaucoma|
|Cardiac disorders||Tachycardia, palpitations|
|Skin and subcutaneous disorders||Allergic reactions (e.g. rash, urticaria, allergic dermatitis). Hypersensitivity reactions including cross-sensitivity with other sympathomimetics may occur|
|Renal and urinary disorders||Dysuria, urinary retention. This is most likely to occur in those with bladder outlet obstruction, such as prostatic hypertrophy.|
Reporting of suspected adverse reactionsReporting 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.
PARACETAMOLLiver 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 factorsIf the patienta) 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.
SymptomsSymptoms of paracetamol overdosage 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.
ManagementImmediate 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 British National Formulary (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. The effectiveness of the antidote declines sharply after this time. 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 National Poisons Information Service (NPIS) or a liver unit.
CAFFEINEDoses over 1g are probably necessary to induce toxicity, 2 5g to produce severe toxicity and 5 10g is likely to be lethal.Symptoms include: epigastric pain, vomiting, diuresis, tachycardia, CNS stimulation (insomnia, restlessness, excitement, agitation, jitteriness, tremors, convulsions).No specific antidote is available, reduce or stop dosage and avoid excessive intake of coffee or tea.
PHENYLEPHRINE HYDROCHLORIDESevere overdosage may produce hypertension and associated reflex bradycardia. Treatment measures include early gastric lavage and symptomatic and supportive measures. The hypertensive effects may be treated with an alpha-receptor blocking agent (such as phentolamine mesylate 6 10 mg) given intravenously, and the bradycardia treated with atropine, preferably only after the pressure has been controlled.
|Pharmacotherapeutic Group:||Other analgesics and antipyretics & Other cold combination preparations|
Analgesic:The mechanism of analgesic action has not been fully determined. Paracetamol may act predominantly by inhibiting a 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 sensities pain receptors to mechanical or chemical stimulation.
Antipyretic:Paracetamol probably produces antipyresis by acting on the hypothalamic heat-regulating 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.
CAFFEINECentral nervous system stimulant Caffeine stimulates all levels of the CNS, although its cortical effects are milder and of shorter duration than those of amfetamines.
Analgesia Adjunct:Caffeine constricts cerebral vasculature with an accompanying decrease in cerebral blood flow and in the oxygen tension of the brain. It is believed that caffeine helps to relieve headaches by providing a more rapid onset of action and/or enhanced pain relief with lower doses of analgesic. Recent studies with ergotamine indicate that the enhancement of effect by the addition of caffeine may also be due to improved gastrointestinal absorption of ergotamine when administered with caffeine.
PHENYLEPHRINE HYDROCHLORIDESympathomimetic amines, such as phenylephrine, act on alpha-adrenergic receptors of the respiratory tract to produce vasoconstriction, which temporarily reduces the swelling associated with inflammation of the mucous membranes lining the nasal and sinus passages. This allows the free drainage of the sinusoidal fluid from the sinuses.In addition to reducing mucosal lining swelling, decongestants also suppress the production of mucus, therefore preventing a build up of fluid within the cavities which could otherwise lead to pressure and pain.
Absorption and FateParacetamol is rapidly absorbed from the gastro-intestinal tract with peak plasma concentrations occurring between 10 and 120 minutes after oral administration. It is metabolised in the liver and excreted in the urine mainly as the glucuronide and sulphate conjugates. Less than 5% is excreted as 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 overdose and cause liver damage.
Absorption and FateCaffeine is absorbed readily after oral administration and is widely distributed throughout the body. Caffeine is metabolised almost completely via oxidation, demethylation, and acetylation, and is excreted in the urine as 1-methyluric acid, 1-methylxanthine, 7-methylxanthine, 1,7-dimethylxanthine (paraxanthine), 5-acetylamino-6-formylamino-3-methyluracil (AFMU), and other metabolites with only about 1% unchanged.
Absorption and FatePhenylephrine has reduced bioavailability from the gastro-intestinal tract owing to irregular absorption and first-pass metabolism by monoamine oxidase in the gut and liver.
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