Buscopan

Buscopan

hyoscine

Manufacturer:

Sanofi-Aventis

Distributor:

DKSH
Full Prescribing Info
Contents
Hyoscine-N-butylbromide.
Description
1 sugar-coated tablet contains Hyoscine-N-butylbromide 10 mg.
Excipients/Inactive Ingredients: Dibasic calcium phosphate, maize starch, starch soluble, aerosil 200, tartaric acid, stearic acid, poly­vidone, saccharose, talc, acacia, titanium dioxide, polyethylene glycol 6000, carnauba wax, beeswax white.
Action
Pharmacology: BUSCOPAN exerts a spasmolytic action on the smooth muscle of the gastro-intestinal, biliary and genito-urinary tracts. As a quaternary ammonium derivative, hyoscine butylbromide does not enter the central nervous system. Therefore, anticholinergic side effects at the central nervous system do not occur. Peripheral anticholinergic action results from a ganglion-blocking action within the vis­ceral wall as well as from an anti-muscarinic activity.
Pharmacokinetics:
Absorption: As a quaternary ammonium compound, hyoscine butylbromide is highly polar and hence only partially absorbed following oral (8%) or rectal (3%) administration. After oral administration of single doses of hyoscine butylbromide in the range of 20 to 400 mg, mean peak plasma concentrations between 0.11 ng/mL and 2.04 ng/mL were found at approximately 2 hours. In the same dose range, the observed mean AUCO-tz-values varied from 0.37 to 10.7 ng h/mL.The median absolute bioavailabili­ties of different dosage forms, i.e. coated tablets, suppositories and oral solution, containing 100 mg of hyoscine butylbromide each were found to be less than 1%.
Distribution: Because of its high affinity for muscarinic receptors and nicotinic receptors, hyoscine butylbromide is mainly distributed on muscle cells of the abdominal and pelvic area as well as in the intramural ganglia of the abdominal organs. Plasma protein binding (albumin) of hyoscine butylbromide is approximately 4.4% Animal studies demonstrate that hyoscine butylbromide does not pass the blood-brain barrier, but no clinical data to this effect is available. Hyoscine butylbromide (1 mM) has been observed to interact with the choline transport (1.4 nM) in epithelial cells of human placenta in vitro.
Metabolism and Elimination: Following oral administration of single doses in the range of 100 to 400 mg, the terminal elimination half-lives ranged from 6.2 to 10.6 hours. The main metabolic pathway is the hydro­lytic cleavage of the ester bond. Orally administered hyoscine butylbromide is excreted in the faeces and in the urine. Studies in man show that 2 to 5% of radioactive doses is eliminated renally after oral, and 0.7 to 1.6% after rectal administration. Approximately 90% of recovered radioactivity can be found in the faeces after oral administration. The urinary excretion of hyoscine butylbromide is less than 0.1% of the dose. The mean apparent oral clearances after oral doses of 100 to 400 mg range from 881 to 1420 L/min, whereas the corresponding volumes of distribution for the same range vary from 6.13 to 11.3 x 105 L, probably due to very low systemic availability.
The metabolites excreted via the renal route bind poorly to the muscarinic receptors and are therefore not considered to contribute to the effect of the hyoscine butylbromide.
Toxicology:Acutely, hyoscine butylbromide has a low index of toxicity: oral LD50 values were 1000 - 3000 mg/kg in mice, 1040 - 3300 mg/kg in rats, and 600 mg/kg in dogs. Toxic signs were ataxia and decreased muscle tone, additionally, in mice tremor and convulsions, in dogs mydriasis, dry mucous membranes and tachycardia. Deaths from respiratory arrest occurred within 24 h. The intrave­nous LD50 values of hyoscine butylbromide were 10 - 23 mg/kg in mice and 18 mg/kg in rats.
In repeated oral dose toxicity studies over 4 weeks, rats toler­ated 500 mg/kg = "no observed adverse effect level (NOAEL). At 2000 mg/kg, by the action on parasympathetic ganglia of visceral area, hyoscine butylbromide paralysed the gastrointestinal function resulting in obstipation. Eleven out of 50 rats died. Haematology and clinical chemistry results did not show dose­ related variations.
Over 26 weeks, rats tolerated 200 mg/kg, while at 250 and 1000 mg/kg, the gastrointestinal function was depressed and deaths oc­curred. The NOAEL for a 39-week oral (capsule) dog study was 30 mg/kg. The majority of clinical findings were attributable to acute effects of hyoscine butylbromide at high dosages (200 mg/kg). No adverse histopathological findings were observed.
A repeated intravenous dose of 1 mg/kg was well tolerated by rats in a 4-week study. At 3 mg/kg, convulsions occurred im­mediately after injection. Rats dosed with 9 mg/kg died from respiratory paralysis. Dogs treated intravenously over 5 weeks at 2 x 1, 2 x 3 and 2 x 9 mg/kg, showed a dose-dependent mydriasis in all treated animals, in addition at 2 x 9 mg/kg, ataxia, salivation and de­creased body weight and food intake were observed. The solu­tions were locally well tolerated.
After repeated i.m. injection, the dose of 10 mg/kg was systemically well tolerated, but lesions of muscles at the site of injection were distinctly increased if compared to control rats. At 60 and 120 mg/kg, mortality was high and local damages were dose-dependently-increased.
Hyoscine butylbromide was neither embryotoxic nor teratogenic at oral doses of up to 200 mg/kg in the diet (rat) or 200 mg/kg by gavage or 50 mg/kg s.c. (rabbit). Fertility was not impaired at doses of up to 200 mg/kg p.o.
Like other cationic drugs, hyoscine butylbromide interacts with the choline transport system of human placental epithelial cells in vitro. Transfer of hyoscine butylbromide to the foetal compart­ment has not been proved.
Hyoscine butylbromide-suppositories were locally well toler­ated.
In special studies concerning local tolerability, a repeated i.m. injection of 15 mg/kg BUSCOPAN over 28 days was studied in dogs and monkeys. Small focal necroses at the site of injection were seen only in dogs. BUSCOPAN was well tolerated in ar­teries and veins of the rabbit's ear. In vitro, 2 % BUSCOPAN injectable solution showed no haemolytic action when mixed with 0.1 ml human blood.
Hyoscine butylbromide revealed no mutagenic or clastogenic potential in the Ames test, in the in vitro gene mutation assay in mammalian V79 cells (HPRT test) and in an in vitro chromosome aberration test in human peripheral lymphocytes. In vivo, hyoscine butylbromide was negative in the rat bone marrow micronucleus assay.
There are no in vivo carcinogenicity studies. Nevertheless, hyoscine butylbromide did not show a tumorigenic potential in two oral 26-week-studies in rats given up to 1000 mg/kg.
Indications/Uses
Gastro-intestinal tract spasm and dyskinesia of the biliary system genito-urinary tract spasm.
Dosage/Direction for Use
Unless otherwise prescribed by the physician, the following dosages are recommended: ORAL: Sugar-coated tablets: Adults and children over 6 years: 3 - 5 times daily 1 - 2 s.c. tablets.
BUSCOPAN should not be taken on a continuous daily basis or for extended periods without investigating the cause of abdomi­nal pain.
Overdosage
Symptoms: In the case of overdose, anticholinergic effects may be observed.
Therapy: If required, parasympathomimetic drugs should be adminis­tered. Ophthalmological advice should be sought in cases of glaucoma urgently. Cardiovascular complications should be treated according to usual therapeutic principles. In case of re­spiratory paralysis: intubation, artificial respiration should be considered. Catheterisation may be required for urinary reten­tion. In addition, appropriate supportive measures should be used as required.
Contraindications
BUSCOPAN is contraindicated in: patients who have demonstrated prior hypersensitivity to hyoscine butylbromide or any other component of the product; myasthenia gravis; mechanical stenosis in the gastrointestinal tract; paralytical or obstructive ileus; megacolon.
In case of rare hereditary conditions that may be incompatible with an excipient of the product (please refer to Precautions) the use of the product is contraindicated.
Special Precautions
In case severe, unexplained abdominal pain persists or worsens, or occurs together with symptoms like fever, nausea, vomiting, changes in bowel movements, abdominal tenderness, decreased blood pressure, fainting or blood in stool, medical advice should immediately be sought.
Because of the potential risk of anticholinergic complications, caution should be used in patients prone to narrow angle glau­coma as well as in patients susceptible to intestinal or urinary outlet obstructions and in those inclined to tachyarrhythmia.
One sugar-coated tablet of 10 mg contains 41.2 mg sucrose, re­sulting in 411.8 mg sucrose per maximum recommended daily dose. Patients with the rare hereditary condition of fructose intolerance should not take this medicine.
One film-coated tablet of 20 mg contains 138.5 mg lactose, resulting in 692.5 mg lactose per maximum recommended daily dose. Patients with the rare hereditary conditions of galactose intolerance e.g. galactosaemia, the Lapp lactase deficiency or glucose-galactose malabsorption should not take this medicine.
BUSCOPAN drops contain the excipients methyl parahydroxy benzoate and propyl parahydroxy benzoate, which may cause allergic reactions (possibly delayed).
BUSCOPAN drops contain 28 mg of sodium per maximum single close (2 ml). This medicinal product contains 140 mg sodium per maximum recommended daily dose. To be taken into consideration by patients on a controlled sodium diet.
Effects on ability to drive and use machines: No studies on the effects on the ability to drive and use machines have been performed.
Use In Pregnancy & Lactation
There is limited data from the use of hyoscine butylbromide in pregnant women.
Animal studies do not indicate direct or indirect harmful effects with respect to reproductive toxicity (please refer to Pharmacology: Toxicology under Actions).
There is insufficient information on the excretion of BUSCOPAN and its metabolites in human milk.
As a precautionary measure, it is preferable to avoid the use of BUSCOPAN during pregnancy and lactation.
No studies on the effects on human fertility have been conducted (please refer to Pharmacology: Toxicology under Actions).
Side Effects
Many of the listed undesirable effects can be assigned to the anticholinergic properties of BUSCOPAN. Anticholinergic side effects of BUSCOPAN are generally mild and self-limited.
Immune system disorders: Anaphylactic shock, anaphylactic reactions, dyspnoea, skin reactions (e.g. urticaria, rash, erythema, pruritus and other hypersensitivity).
Cardiac disorders: Tachycardia.
Gastrointestinal disorders: Dry mouth.
Skin and subcutaneous tissue disorders: Dyshidrosis.
Renal and urinary disorders: Urinary retention.
Drug Interactions
The anticholinergic effect of drugs such as tri- and tetracyclic anti­-depressants, antihistamines, antipsychotics, quinidine, amanta­dine, disopyramide and other anticholinergics (e.g. tiotropium, ipratropium, atropine-like compounds) may be intensified by BUSCOPAN.
Concomitant treatment with dopamine antagonists such as metoclopramide may result in diminution of the effects of both drugs on the gastrointestinal tract.
The tachycardic effects of beta-adrenergic agents may be en­hanced by BUSCOPAN.
Storage
Store below 30°C.
MIMS Class
ATC Classification
A03BB01 - butylscopolamine ; Belongs to the class of belladonna alkaloids, semisynthetic, quaternary ammonium compounds. Used in the treatment of functional gastrointestinal disorders.
Presentation/Packing
Tab 10 mg x 50 x 10's.
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