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New search Medicine profile Acarbose

Clinical medicine profile

Acarbose

Alpha-glucosidase inhibitor antidiabetic

POM
Evidence state Source-linked Review date not recorded
Route
See product SmPC
Schedule
POM
ATC
Not assigned
PPB status
registered
Patient advice Check interactions
01 Risk first

Safety essentials

The information most likely to change a prescribing or dispensing decision.

Contraindications

  • CONTRAINDICATIONS Acarbose tablets are contraindicated in patients with known hypersensitivity to the drug.
  • Acarbose tablets are contraindicated in patients with diabetic ketoacidosis or cirrhosis.
  • Acarbose tablets are also contraindicated in patients with inflammatory bowel disease, colonic ulceration, partial intestinal obstruction or in patients predisposed to intestinal obstruction.
  • In addition, acarbose tablets are contraindicated in patients who have chronic intestinal diseases associated with marked disorders of digestion or absorption and in patients who have conditions that may deteriorate as a result of increased gas formation in the intestine.

Precautions

  • Monitor serum hepatic transaminase in patients on 200mg/day for the first six months
  • may enhance hypoglycaemic effect of insulin and sulphonylureas.
  • Due to its MOA, hypoglycaemic episodes should be treated with oral glucose not sucrose.
02 Point of care

Dosing matrix

Population and organ-function guidance, shown together for faster comparison.

Adult

DOSAGE AND ADMINISTRATION There is no fixed dosage regimen for the management of diabetes mellitus with acarbose tablets or any other pharmacologic agent. Dosage of acarbose tablets must be individualized on the basis of both effectiveness and tolerance while not exceeding the maximum recommended dose of 100 mg t.i.d. Acarbose tablets should be taken three times daily at the start (with the first bite) of each main meal. Acarbose tablets should be started at a low dose, with gradual dose escalation as described below, both to reduce gastrointestinal side effects and to permit identification of the minimum dose required for adequate glycemic control of the patient.If the prescribed diet is not observed, the intestinal side effects may be intensified. If strongly distressing symptoms develop in spite of adherence to the diabetic diet prescribed, the doctor must be consulted and the dose temporarily or permanently reduced. During treatment initiation and dose titration (see below), one-hour postprandial plasma glucose may be used to determine the therapeutic response to acarbose tablets and identify the minimum effective dose for the patient. Thereafter, glycosylated hemoglobin should be measured at intervals of approximately three months. The therapeutic goal should be to decrease both postprandial plasma glucose and glycosylated hemoglobin levels to normal or near normal by using the lowest effective dose of acarbose tablets, either as monotherapy or in combination with sulfonylureas, insulin or metformin. Initial Dosage The recommended starting dosage of acarbose tablets is 25 mg given orally three times daily at the start (with the first bite) of each main meal. However, some patients may benefit from more gradual dose titration to minimize gastrointestinal side effects. This may be achieved by initiating treatment at 25 mg once per day and subsequently increasing the frequency of administration to achieve 25 mg t.i.d. Maintenance Dosage Once a 25 mg t.i.d. dosage regimen is reached, dosage of acarbose tablets should be adjusted at 4-8 week intervals based on one-hour postprandial glucose or glycosylated hemoglobin levels, and on tolerance. The dosage can be increased from 25 mg t.i.d. to 50 mg t.i.d. Some patients may benefit from further increasing the dosage to 100 mg t.i.d. The maintenance dose ranges from 50 mg t.i.d. to 100 mg t.i.d. However, since patients with low body weight may be at increased risk for elevated serum transaminases, only patients with body weight > 60 kg should be considered for dose titration above 50 mg t.i.d. (see PRECAUTIONS ). If no further reduction in postprandial glucose or glycosylated hemoglobin levels is observed with titration to 100 mg t.i.d., consideration should be given to lowering the dose. Once an effective and tolerated dosage is established, it should be maintained. Maximum Dosage The maximum recommended dose for patients ≤ 60 kg is 50 mg t.i.d. The maximum recommended dose for patients > 60 kg is 100 mg t.i.d. Patients Receiving Sulfonylureas or Insulin Sulfonylurea agents or insulin may cause hypoglycemia. Acarbose tablets given in combination with a sulfonylurea or insulin will cause a further lowering of blood glucose and may increase the potential for hypoglycemia. If hypoglycemia occurs, appropriate adjustments in the dosage of these agents should be made.

Paediatric

Pediatric Use Safety and effectiveness of acarbose tablets in pediatric patients have not been established.

Renal

Avoid CrCl <25.

  • CrCl 0–120: See renal_dose_adjustment; confirm product SmPC.
Hepatic

Avoid cirrhosis/severe HI.

03 Clinical use

Use, effects & interactions

Indications

  • INDICATIONS AND USAGE Acarbose tablets, USP are indicated as an adjunct to diet and exercise to improve glycemic control in adults with type 2 diabetes mellitus.
  • Clinical selection for Acarbose should follow culture results where relevant, Kenya STG/EML recommendations, and the current product SmPC.
  • Class context: Alpha-glucosidase inhibitor antidiabetic.
  • Confirm site-specific dose, duration and monitoring before prescribing.

Adverse effects

  • ADVERSE REACTIONS Digestive Tract Gastrointestinal symptoms are the most common reactions to acarbose tablets.
  • In U.S. placebo-controlled trials, the incidences of abdominal pain, diarrhea, and flatulence were 19%, 31%, and 74% respectively in 1255 patients treated with acarbose tablets 50-300 mg t.i.d., whereas the corresponding incidences were 9%, 12%, and 29% in 999 placebo-treated patients.
  • In a one-year safety study, during which patients kept diaries of gastrointestinal symptoms, abdominal pain and diarrhea tended to return to pretreatment levels over time, and the frequency and intensity of flatulence tended to abate with time.
  • The increased gastrointestinal tract symptoms in patients treated with acarbose tablets are a manifestation of the mechanism of action of acarbose and are related to the presence of undigested carbohydrate in the lower GI tract.
  • If the prescribed diet is not observed, the intestinal side effects may be intensified.
  • If strongly distressing symptoms develop in spite of adherence to the diabetic diet prescribed, the doctor must be consulted and the dose temporarily or permanently reduced.
  • Elevated Serum Transaminase Levels See PRECAUTIONS .
  • Other Abnormal Laboratory Findings Small reductions in hematocrit occurred more often in acarbose-treated patients than in placebo-treated patients but were not associated with reductions in hemoglobin.
  • Low serum calcium and low plasma vitamin B 6 levels were associated with acarbose tablets therapy but are thought to be either spurious or of no clinical significance.
  • Postmarketing Adverse Event Reports Additional adverse events reported from worldwide postmarketing experience include fulminant hepatitis with fatal outcome, hypersensitive skin reactions (for example rash, erythema, exanthema and uticaria), edema, ileus/subileus, jaundice and/or hepatitis and associated liver damage, thrombocytopenia, and pneumatosis cystoides intestinalis (see PRECAUTIONS ).
  • Pneumatosis Cystoides Intestinalis There have been rare postmarketing reports of pneumatosis cystoides intestinalis associated with the use of alpha-glucosidase inhibitors, including acarbose tablets.Pneumatosis cystoides intestinalis may present with symptoms of diarrhea, mucus discharge, rectal bleeding, and constipation.Complications may include pneumoperitoneum, volvulus, intestinal obstruction, intussusception, intestinal hemorrhage, and intestinal perforation.
  • If pneumatosis cystoides intestinalis is suspected, discontinue acarbose tablets and perform the appropriate diagnostic imaging.
  • To report SUSPECTED ADVERSE REACTIONS, contact Avet Pharmaceuticals Inc. at 1-866-901-DRUG (3784) or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.
  • Professional use: confirm indication, dose, duration, monitoring and patient counselling points against current Kenya STG / EML and the product SmPC.
  • Document allergy status and key interactions.
04 Pharmacology

Mechanism & disposition

In contrast to sulfonylureas, acarbose tablets do not enhance insulin secretion.

In contrast to sulfonylureas, acarbose tab…The antihyperglycemic action of acarbose r…Pancreatic alpha-amylase hydrolyzes comple…
Read complete mechanism

In contrast to sulfonylureas, acarbose tablets do not enhance insulin secretion. The antihyperglycemic action of acarbose results from a competitive, reversible inhibition of pancreatic alpha-amylase and membrane-bound intestinal alpha-glucoside hydrolase enzymes. Pancreatic alpha-amylase hydrolyzes complex starches to oligosaccharides in the lumen of the small intestine, while the membrane-bound intestinal alpha-glucosidases hydrolyze oligosaccharides, trisaccharides, and disaccharides to glucose and other monosaccharides in the brush border of the small intestine. In diabetic patients, this enzyme inhibition results in a delayed glucose absorption and a lowering of postprandial hyperglycemia. Because its mechanism of action is different, the effect of acarbose tablets to enhance glycemic control is additive to that of sulfonylureas, insulin or metformin when used in combination. In addition, acarbose tablets diminish the insulinotropic and weight-increasing effects of sulfonylureas. Acarbose has no inhibitory activity against lactase and consequently would not be expected to induce lactose intolerance.

Onset

Product-specific

Duration

Product-specific

Route

See product SmPC

Absorption

and a lowering of postprandial hyperglycemia. Because its mechanism of action is different, the effect of acarbose tablets to enhance glycemic control is additive to that of sulfonylureas, insulin or metformin when used in combination. In addition, acarbose tablets diminish the i...

Metabolism

Acarbose is metabolized exclusively within the gastrointestinal tract, principally by intestinal bacteria, but also by digestive enzymes. A fraction of these metabolites (approximately 34% of the dose) was absorbed and subsequently excreted in the urine. At least 13 metabolites h...

Elimination

The fraction of acarbose that is absorbed as intact drug is almost completely excreted by the kidneys. When acarbose was given intravenously , 89% of the dose was recovered in the urine as active drug within 48 hours. In contrast, less than 2% of an oral dose was recovered in the...

Half-life

of acarbose activity is approximately 2 hours in healthy volunteers. Consequently, drug accumulation does not occur with three times a day (t.i.d.) oral dosing. Special Populations The mean steady-state area under the curve (AUC) and maximum concentrations of acarbose were approx...

05 Special populations

Pregnancy, lactation & diet

Pregnancy

Pregnancy Teratogenic Effects: Pregnancy Category B. The safety of acarbose tablets in pregnant women has not been established. Reproduction studies have been performed in rats at doses up to 480 mg/kg (corresponding to 9 times the exposure in humans, based on drug blood levels) and have revealed no evidence of impaired fertility or harm to the fetus due to acarbose. In rabbits, reduced maternal body weight gain, probably the result of the pharmacodynamic activity of high doses of acarbose in the intestines may have been responsible for a slight increase in the number of embryonic losses. However, rabbits given 160 mg/kg acarbose (corresponding to 10 times the dose in man, based on body surface area) showed no evidence of embryotoxicity and there was no evidence of teratogenicity at a dose 32 times the dose in man (based on body surface area). There are, however, no adequate and well-controlled studies of acarbose tablets in pregnant women. Because animal reproduction studies are not always predictive of the human response, this drug should be used during pregnancy only if clearly needed. Because current information strongly suggests that abnormal blood glucose levels during pregnancy are associated with a higher incidence of congenital anomalies as well as increased neonatal morbidity and mortality, most experts recommend that insulin be used during pregnancy to maintain blood glucose levels as close to normal as possible.

Lactation

Nursing Mothers A small amount of radioactivity has been found in the milk of lactating rats after administration of radiolabeled acarbose. It is not known whether this drug is excreted in human milk. Because many drugs are excreted in human milk, acarbose tablets should not be administered to a nursing woman.

06 Kenya market

Brands & loaded prices

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07 Provenance

Sources & review state

Primary sourceLocal active-ingredient clinical extract; FDA drug label via OpenFDA/DailyMed; Batch A alphabetical research (INN; confirm vs SmPC/local guidelines); Professional class pharmacology (Therapeutic agent (verify pharmacological class))
Last reviewedNot recorded
EvidenceSource-linked
Open source document ↗

Decision support only. Confirm patient-specific decisions against the current product SmPC, Kenya STG/EML, and professional judgement.