Ranitidine 150mg Tablets
SUMMARY OF PRODUCT CHARACTERISTICS
1 NAME OF THE MEDICINAL PRODUCT
Ranitidine 150 mg Tablets BP
2 QUALITATIVE AND QUANTITATIVE COMPOSITION
Each tablet contains Ranitidine Hydrochloride equivalent to 150 mg ranitidine. For excipients see 6.1.
3 PHARMACEUTICAL FORM
Film-coated tablets.
Appearance: White to yellowish, circular, convex, film-coated tablets, diameter 10 mm, impressed with the Greek letter Delta ( ,)on one face and a central division line on the other face.
4 CLINICAL PARTICULARS
4.1 Therapeutic indications
1) For the treatment of duodenal ulcer and benign gastric ulcer, including that associated with non-steroidal anti-inflammatory agents.
2) For the prevention of NSAID associated duodenal ulcers.
3) For the treatment of post-operative ulcer, Zollinger-Ellison syndrome and oesophageal reflux disease including the long-term management of healed oesophagitis. Other patients with chronic episodic dyspepsia, characterised by pain (epigastric or retrosternal) which is related to meals or disturbs sleep but is not associated with the preceding conditions may benefit from ranitidine treatment.
4) Ranitidine Tablets are indicated for the following conditions where reduction of gastric secretion and acid output is desirable: the prophylaxis of gastrointestinal haemorrhage from stress ulceration in seriously ill patients; the prophylaxis of recurrent haemorrhage in patients with bleeding peptic ulcers and before general anaesthesia in patients considered to be at risk of acid aspiration (Mendelson’s syndrome), particularly obstetric patients during labour.
Children (3 to 18 years)
- Short term treatment of peptic ulcer
- Treatment of gastro-oesophageal reflux, including reflux oesophagitis and symptomatic relief of gastro-oesophageal reflux disease.
4.2 Posology and method of administration
Adults: The usual dosage is 150 mg twice daily, taken in the morning and evening.
Alternatively, patients with duodenal ulceration, gastric ulceration or oesophageal reflux disease may be treated with a single bedtime dose of 300 mg. It is not necessary to time the dose in relation to meals. In most cases of duodenal ulcer, benign gastric ulcer and post operative ulcer, healing occurs in 4 weeks. Healing usually occurs after a further 4 weeks of treatment in those patients whose ulcers have not fully healed after the initial course of therapy.
In ulcers following NSAID therapy or associated with continued NSAIDs, 8 weeks’ treatment may be necessary.
For the prevention of NSAID associated duodenal ulcers ranitidine 150 mg twice daily may be given concomitantly with NSAID therapy. In duodenal ulcer 300 mg twice daily for 4 weeks results in healing rates which are higher than those at 4 weeks with ranitidine 150 mg twice daily or 300 mg at night. The increased dose has not been associated with an increased incidence of unwanted effects.
Maintenance treatment at a reduced dosage of 150 mg at bedtime is recommended for patients who have responded to short-term therapy, particularly those with a history of recurrent ulcer. In the management of oesophageal reflux disease, the recommended course of treatment is either 150 mg twice daily or 300 mg at bedtime for up to 8 weeks or if necessary 12 weeks.
In patients with moderate to severe oesophagitis, the dosage of ranitidine may be increased to 150 mg four times daily for up to 12 weeks. The increased dose has not been associated with an increased incidence of unwanted effects. For the long-term treatment of healed oesophagitis, the recommended adult oral dose is 150 mg twice daily. Long-term treatment is not indicated in the management of patients with unhealed oesophagitis, with or without Barrett’s epithelium.
In patients with Zollinger-Ellison syndrome, the starting dose is 150 mg three times daily and this may be increased as necessary. Patients with this syndrome have been given increasing doses up to 6g daily and these doses have been well tolerated.
For patients with chronic episodic dyspepsia the recommended course of treatment is 150 mg twice daily for up to 6 weeks. Anyone not responding or relapsing shortly afterwards should be investigated.
In the prophylaxis of haemorrhage from stress ulceration in seriously ill patients or the prophylaxis of recurrent haemorrhage in patients bleeding from peptic ulceration, treatment with 150 mg twice daily may be substituted for ranitidine injection once oral feeding commences in patients considered to be still at risk from these conditions.
In patients thought to be at risk of acid aspiration syndrome an oral dose of 150 mg can be given 2 hours before induction of general anaesthesia, and preferably also 150 mg the previous evening.
In obstetric patients at commencement of labour, an oral dose of 150 mg may be given followed by 150 mg at 6 hourly intervals. It is recommended that since gastric emptying and drug absorption are delayed during labour, any patient requiring emergency general anaesthesia should be given, in addition, a non-particulate antacid (eg sodium citrate) prior to induction of anaesthesia. The usual precautions to avoid acid aspiration should also be taken.
Children:
Children 12 years and over
For children over 12 years the adult dosage is given.
Children from 3 to 11 years and over 30 kg of weight
See Section 5.2 Pharmacokinetic Properties - Special Patient Populations.
Peptic Ulcer Acute Treatment
The recommended oral dose for the treatment of peptic ulcer in children is 4 mg/kg/day to 8 mg/kg/day administered as two divided doses to a maximum of 300 mg ranitidine per day for a duration of 4 weeks. For those patients with incomplete healing, another 4 weeks of therapy is indicated, as healing usually occurs after eight weeks of treatment.
Gastro-Oesophageal Reflux
The recommended oral dose for the treatment of gastro-oesophageal reflux in children is 5 mg/kg/day to 10 mg/kg/day administered as two divided doses in a maximum dose of 600 mg (the maximum dose is likely to apply to heavier children or adolescents with severe symptoms).
Neonates
Safety and efficacy in new-born patients has not been established.
Use in elderly patients: Rates of healing of ulcers in clinical trial patients aged 65 and over have not been found to differ from those in younger patients. Additionally, there was no difference in the incidence of adverse effects.
For oral use.
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
Malignancy
The possibility of malignancy should be excluded before commencement of therapy in patients with gastric ulcer and in patients of middle age and over with new or recently changed dyspeptic symptoms as treatment with ranitidine may mask symptoms of gastric carcinoma.
Renal Disease
Ranitidine is excreted via the kidney and so plasma levels of the drug are increased in patients with renal impairment. The dosage should be adjusted as detailed in section 4.2 Patients with renal impairment.
Regular supervision of patients who are taking non-steroidal antiinflammatory drugs concomitantly with ranitidine is recommended, especially in the elderly and in those with a history of peptic ulcer.
Rare clinical reports suggest that ranitidine may precipitate acute porphyric attacks. Ranitidine should therefore be avoided in patients with a history of acute porphyria.
In patients such as the elderly, persons with chronic lung disease, diabetes or the immunocompromised, there may be an increased risk of developing community acquired pneumonia. A large epidemiological study showed an increased risk of developing community acquired pneumonia in current users of ranitidine alone versus those who had stopped treatment, with an observed adjusted relative risk increase of 1.82 (95% CI 1.26-2.64). Post-marketing data indicate reversible mental confusion, depression, and hallucinations have been reported most frequently in severely ill and elderly patients (see section 4.8).
4.5 Interaction with other medicinal products and other forms of interaction
Ranitidine has the potential to affect the absorption, metabolism or renal excretion of other drugs. The altered pharmacokinetics may necessitate dosage adjustment of the affected drug or discontinuation of treatment
Interactions occur by several mechanisms including:
1) Inhibition of cytochrome P450-linked mixed function oxygenase system: Ranitidine at usual therapeutic doses does not potentiate the actions of drugs which are inactivated by this enzyme system such as diazepam, lidocaine, phenytoin, propanolol and theophylline.
There have been reports of altered prothrombin time with coumarin anticoagulants (e.g. warfarin). Due to the narrow therapeutic index, close monitoring of increased or decreased prothrombin time is recommended during concurrent treatment with ranitidine.
2) Competition for renal tubular secretion:
Since ranitidine is partially eliminated by the cationic system, it may affect the clearance of other drugs eliminated by this route. High doses of ranitidine (e.g. such as those used in the treatment of Zollinger-Ellison syndrome) may reduce the excretion of procainamide and N-acetylprocainamide resulting in increased plasma level of these drugs.
3) Alteration of gastric pH:
The bioavailability of certain drugs may be affected. This can result in either an increase in absorption (e.g. triazolam, midazolam, glipizide) or a decrease in absorption (e.g. ketoconazole, atazanavir, delaviridine, gefitnib).
There is no evidence of an interaction between ranitidine and amoxicillin or metronidazole.
If high doses (2 g) of sucralfate are co-administered with ranitidine the absorption of the latter may be reduced. This effect is not seen if sucralfate is taken after an interval of 2 hours.
4.6 Fertility, Pregnancy and lactation
Pregnancy
Ranitidine crosses the placenta but therapeutic doses administered to obstetric patients in labour or undergoing caesarean section have been without any adverse effect on labour, delivery or subsequent neonatal progress. Ranitidine is also excreted in human breast milk. Like other drugs, ranitidine should only be used during pregnancy and nursing if considered essential.
Breast-feeding
Ranitidine is excreted in human breast milk. Like other drugs ranitidine should only be used during breast-feeding if considered essential.
Fertility
There are no data on the effects of ranitidine on human fertility. There were no effects on male and female fertility in animal studies (see section 5.3).
4.7 Effects on ability to drive and use machines
None known.
4.8 Undesirable effects
The following convention has been utilised for the classification of undesirable effects: very common (>1/10), common (>1/100, <1/10), uncommon (>1/1000, <1/100), rare (>1/10,000, <1/1000), very rare (<1/10,000).Adverse event frequencies have been estimated from spontaneous reports from postmarketing data.
Blood & Lymphatic System Disorders
Very Rare:
Blood count changes (leucopenia, thrombocytopenia). These are usually reversible. Agranulocytosis or pancytopenia, sometimes with marrow hypoplasia or marrow aplasia.
Immune System Disorders Rare:
Hypersensitivity reactions (urticaria, angioneurotic oedema, fever, bronchospasm, hypotension and chest pain).
Very Rare:
Anaphylactic shock.
Not known:
Dyspnoea.
These events have been reported after a single dose.
Psychiatric Disorders
Very Rare:
Reversible mental confusion, depression and hallucinations.
These have been reported predominantly in severely ill patients, in elderly and in nephropatic patients.
Nervous System Disorders Very Rare:
Headache (sometimes severe), dizziness and reversible involuntary movement disorders.
Eye Disorders Very Rare:
Reversible blurred vision.
There have been reports of blurred vision, which is suggestive of a change in accommodation.
Cardiac Disorders
Very Rare:
As with other H2 receptor antagonists bradycardia, A-V block and tachycardia. Vascular Disorders Very Rare:
Vasculitis.
Gastrointestinal Disorders
Uncommon:
Abdominal pain, constipation, nausea (these symptoms mostly improved during continued treatment).
Very Rare:
Acute pancreatitis, diarrhoea Hepatobiliary Disorders
Rare:
Transient and reversible changes in liver function tests.
Very Rare:
Hepatitis (hepatocellular, hepatocanalicular or mixed) with or without jaundice, these were usually reversible.
Skin and Subcutaneous Tissue Disorders Rare:
Skin Rash.
Very Rare:
Erythema multiforme, alopecia.
Musculoskeletal and Connective Tissue Disorders
Very Rare:
Musculoskeletal symptoms such as arthralgia and myalgia.
Renal and Urinary Disorders
Rare:
Elevation of plasma creatinine (usually slight; normalised during continued treatment)
Very Rare:
Acute interstitial nephritis.
Reproductive System and Breast Disorders
Very Rare:
Reversible impotence, breast symptoms and breast conditions (such as gynaecomastia and galactorrhoea).
Paediatric population
The safety of ranitidine has been assessed in children aged 0 to 16 years with acid-related disease and was generally well tolerated with an adverse event profile resembling that in adults. There are limited long term safety data available, in particular regarding growth and development.
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, website www.mhra.gov.uk/yellowcard.
4.9 Overdose
Symptoms and signs
Ranitidine is very specific in action and accordingly no particular problems are expected following overdosage.
Treatment
Symptomatic and supportive therapy should be given as appropriate.
5.1 Pharmacodynamic properties
Pharmacotherapeutic group: H2-receptor antagonists ATC Code: A02B A02
Ranitidine is a specific, rapidly acting histamine H2-antagonist.
Ranitidine inhibits basal and stimulated secretion of gastric acid, reducing both the volume and the acid and pepsin content of the secretion. Ranitidine has a relatively long duration of action and so a single 150 mg dose effectively suppresses gastric acid secretion for 12 hours.
5.2 Pharmacokinetic properties Absorption
Following oral administration of 150 mg ranitidine, maximum plasma concentrations (300 to 550 ng/mL) occurred after 1—3 hours. Two distinct peaks or plateau in the absorption phase result from reabsorption of drug excreted into the intestine. The absolute bioavailability of ranitidine is 50-60% and plasma concentrations increase proportionally with increasing dose up to 300 mg.
Distribution
Ranitidine is not extensively bound to plasma proteins (15%), but exhibits a large volume of distribution ranging from 96 to 142 L.
Metabolism
Ranitidine is not extensively metabolised. The fraction of the dose recovered as metabolites is similar after both oral and i.v. dosing; and includes 6% of the dose in urine as the N-oxide, 2% as the S-oxide, 2% as desmethylranitidine and 1 to 2% as the furoic acid analogue.
Elimination
Plasma concentrations decline bi-exponentially, with a terminal half-life of 2-3 hours. The major route of elimination is renal. After IV administration of 150 mg 3H-ranitidine, 98% of the dose was recovered, including 5% in faeces and 93% in urine, of which 70% was unchanged parent drug. After oral administration of 150 mg 3H-ranitidine, 96% of the dose was recovered, 26% in faeces and 70% in urine of which 35% was unchanged parent drug. Less than 3% of the dose is excreted in bile. Renal clearance is approximately 500 mL/min, which exceeds glomerular filtration indicating net renal tubular secretion.
Special Patient Populations Children (3 years and above)
Limited pharmacokinetic data have shown that there are no significant differences in half-life (range for children 3 years and above: 1.7 - 2.2 h) and plasma clearance (range for children 3 years and above: 9-22 ml/min/kg) between children and healthy adults receiving oral ranitidine when correction is made for body weight.
Patients over 50 years of age
In patients over 50 years of age, half-life is prolonged (3-4 h) and clearance is reduced, consistent with the age-related decline of renal function. However, systemic exposure and accumulation are 50% higher. This difference exceeds the effect of declining renal function, and indicates increased bioavailability in older patients.
5.3 Preclinical safety data
Non-clinical data revealed no special hazard for humans based on conventional studies of safety pharmacology, repeated-dose toxicity, genotoxicity, carcinogenic potential and toxicity to reproduction and development.
6 PHARMACEUTICAL PARTICULARS
6.1 List of excipients
tablet core-croscarmellose sodium magnesium stearate microcrystalline cellulose
tablet coat-
polymethacrylate
hydroxypropylmethylcellulose
polyethylene glycol 6000 purified talc titanium dioxide
6.2 Incompatibilities
None known.
6.3 Shelf life
36 months.
6.4 Special precautions for storage
Do not store above 25°C. Store in the original package.
6.5 Nature and contents of container
Carton: Printed carton manufactured from white folding box board.
Blister packs (al/al).
Push-through foil for PVC blister. Aluminium foil, 20pm, one side bright, hard, plain, dull side lacquered (suitable for subsequent printing), bright side heatseal lacquered suitable for sealing against PVC.
Formpacking bottom strip. Aluminium strip, 45pm, one side bright, soft, plain, dull side lacquer-laminated to OPA film, 25 pm, bright side lacquer-laminated to hard PVC film, 60pm.
Pack sizes: 28, 30, 56, 60, 84, 90, 100, 112, 120, 168, and 180
6.6 Special precautions for disposal
Not applicable.
MARKETING AUTHORISATION HOLDER
7
Medley Pharma Limited Unit 2A,
Olympic Way Sefton Business Park Liverpool L30 1RD UK
8 MARKETING AUTHORISATION NUMBER(S)
PL 43870/0026
9 DATE OF FIRST AUTHORISATION/RENEWAL OF THE AUTHORISATION
07/01/2003
10 DATE OF REVISION OF THE TEXT
29/03/2016