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The following serious adverse reactions are discussed in more detail below and elsewhere in the labeling:
Clinical Trials Experience
Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice.
Approximately 2,800 patients with type 2 diabetes have been treated with AMARYL in the controlled clinical trials. In these trials, approximately 1,700 patients were treated with AMARYL for at least 1 year.
Table 1 summarizes adverse events, other than hypoglycemia, that were reported in 11 pooled placebo-controlled trials, whether or not considered to be possibly or probably related to study medication. Treatment duration ranged from 13 weeks to 12 months. Terms that are reported represent those that occurred at an incidence of ≥ 5% among AMARYL-treated patients and more commonly than in patients who received placebo.
Table 1: Eleven Pooled Placebo-Controlled Trials ranging
from 13 weeks to 12 months: Adverse Events (Excluding Hypoglycemia) Occurring
in ≥ 5% of AMARYL-treated Patients and at a Greater Incidence than with
|*AMARYL doses ranged from 1-16 mg administered daily
†Insufficient information to determine whether any of the accidental injury events were associated with hypoglycemia
In a randomized, double-blind, placebo-controlled monotherapy trial of 14 weeks duration, patients already on sulfonylurea therapy underwent a 3-week washout period then were randomized to AMARYL 1 mg, 4 mg, 8 mg or placebo. Patients randomized to AMARYL 4 mg or 8 mg underwent forced-titration from an initial dose of 1 mg to these final doses, as tolerated [see Clinical Studies]. The overall incidence of possible hypoglycemia (defined by the presence of at least one symptom that the investigator believed might be related to hypoglycemia; a concurrent glucose measurement was not required) was 4% for AMARYL 1 mg, 17% for AMARYL 4 mg, 16% for AMARYL 8 mg and 0% for placebo. All of these events were self-treated.
In a randomized, double-blind, placebo-controlled monotherapy trial of 22 weeks duration, patients received a starting dose of either 1 mg AMARYL or placebo daily. The dose of AMARYL was titrated to a target fasting plasma glucose of 90-150 mg/dL. Final daily doses of AMARYL were 1, 2, 3, 4, 6 or 8 mg [see Clinical Studies]. The overall incidence of possible hypoglycemia (as defined above for the 14-week trial) for AMARYL vs. placebo was 19.7% vs. 3.2%. All of these events were self-treated.
Weight gain: AMARYL, like all sulfonylureas, can cause weight gain [see Clinical Studies].
Allergic Reactions: In clinical trials, allergic reactions, such as pruritus, erythema, urticaria, and morbilliform or maculopapular eruptions, occurred in less than 1% of AMARYL-treated patients. These may resolve despite continued treatment with AMARYL. There are postmarketing reports of more serious allergic reactions (e.g., dyspnea, hypotension, shock) [see WARNINGS AND PRECAUTIONS].
Laboratory Tests: Elevated Serum Alanine Aminotransferase (ALT): In 11 pooled placebo-controlled trials of AMARYL, 1.9% of AMARYL-treated patients and 0.8% of placebo-treated patients developed serum ALT greater than 2 times the upper limit of the reference range.
The following adverse reactions have been identified during post-approval use of AMARYL. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.
- Serious hypersensitivity reactions, including anaphylaxis, angioedema, and Stevens-Johnson Syndrome [see WARNINGS AND PRECAUTIONS]
- Hemolytic anemia in patients with and without G6PD deficiency [see WARNINGS AND PRECAUTIONS]
- Impairment of liver function (e.g. with cholestasis and jaundice), as well as hepatitis, which may progress to liver failure.
- Porphyria cutanea tarda, photosensitivity reactions and allergic vasculitis
- Leukopenia, agranulocytosis, thrombocytopenia, aplastic anemia, and pancytopenia
- Hepatic porphyria reactions and disulfiram-like reactions
- Hyponatremia and syndrome of inappropriate antidiuretic hormone secretion (SIADH), most often in patients who are on other medications or who have medical conditions known to cause hyponatremia or increase release of antidiuretic hormone
Read the Amaryl (glimepiride) Side Effects Center for a complete guide to possible side effects
Drugs Affecting Glucose Metabolism
A number of medications affect glucose metabolism and may require AMARYL dose adjustment and particularly close monitoring for hypoglycemia or worsening glycemic control.
The following are examples of medications that may increase the glucose-lowering effect of sulfonylureas including AMARYL, increasing the susceptibility to and/or intensity of hypoglycemia: oral anti-diabetic medications, pramlintide acetate, insulin, angiotensin converting enzyme (ACE) inhibitors, H2 receptor antagonists, fibrates, propoxyphene, pentoxifylline, somatostatin analogs, anabolic steroids and androgens, cyclophosphamide, phenyramidol, guanethidine, fluconazole, sulfinpyrazone, tetracyclines, clarithromycin, disopyramide, quinolones, and those drugs that are highly protein-bound, such as fluoxetine, nonsteroidal anti-inflammatory drugs, salicylates, sulfonamides, chloramphenicol, coumarins, probenecid and monoamine oxidase inhibitors. When these medications are administered to a patient receiving AMARYL, monitor the patient closely for hypoglycemia. When these medications are withdrawn from a patient receiving AMARYL, monitor the patient closely for worsening glycemic control.
The following are examples of medications that may reduce the glucose-lowering effect of sulfonylureas including AMARYL, leading to worsening glycemic control: danazol, glucagon, somatropin, protease inhibitors, atypical antipsychotic medications (e.g., olanzapine and clozapine), barbiturates, diazoxide, laxatives, rifampin, thiazides and other diuretics, corticosteroids, phenothiazines, thyroid hormones, estrogens, oral contraceptives, phenytoin, nicotinic acid, sympathomimetics (e.g., epinephrine, albuterol, terbutaline), and isoniazid. When these medications are administered to a patient receiving AMARYL, monitor the patient closely for worsening glycemic control. When these medications are withdrawn from a patient receiving AMARYL, monitor the patient closely for hypoglycemia.
Beta-blockers, clonidine, and reserpine may lead to either potentiation or weakening of AMARYL's glucose-lowering effect.
Both acute and chronic alcohol intake may potentiate or weaken the glucose-lowering action of AMARYL in an unpredictable fashion.
The signs of hypoglycemia may be reduced or absent in patients taking sympatholytic drugs such as beta-blockers, clonidine, guanethidine, and reserpine.
A potential interaction between oral miconazole and sulfonylureas leading to severe hypoglycemia has been reported. Whether this interaction also occurs with other dosage forms of miconazole is not known.
Cytochrome P450 2C9 Interactions
There may be an interaction between glimepiride and inhibitors (e.g., fluconazole) and inducers (e.g., rifampin) of cytochrome P450 2C9. Fluconazole may inhibit the metabolism of glimepiride, causing increased plasma concentrations of glimepiride which may lead to hypoglycemia. Rifampin may induce the metabolism of glimepiride, causing decreased plasma concentrations of glimepiride which may lead to worsening glycemic control.
Read the Amaryl Drug Interactions Center for a complete guide to possible interactions
Last reviewed on RxList: 2/15/2012
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