Overview
11 DESCRIPTION The active ingredient in esomeprazole magnesium delayed-release capsules USP for oral administration is bis(5-methoxy-2-[(S)-[(4-methoxy-3,5-dimethyl-2-pyridinyl)methyl]sulfinyl]-1 H -benzimidazole-1-yl) magnesium dihydrate, a PPI. Esomeprazole is the S-isomer of omeprazole, which is a mixture of the S- and R- isomers. (Initial U.S. approval of esomeprazole magnesium: 2001).
Mechanism of Action
12 CLINICAL PHARMACOLOGY 12.1 Mechanism of Action Esomeprazole belongs to a class of antisecretory compounds, the substituted benzimidazoles, that suppress gastric acid secretion by specific inhibition of the H+/K+ ATPase enzyme system at the secretory surface of the gastric parietal cell. Esomeprazole is protonated and converted in the acidic compartment of the parietal cell forming the active inhibitor, the achiral sulphenamide. Because this enzyme system is regarded as the acid (proton) pump within the gastric mucosa, esomeprazole has been characterized as a gastric acid-pump inhibitor, in that it blocks the final step of acid production. This effect is dose-related and leads to inhibition of both basal and stimulated acid secretion irrespective of the stimulus. 12.
Indications
- 1 INDICATIONS AND USAGE Esomeprazole magnesium delayed-release capsules are a proton pump inhibitor (PPI). Esomeprazole magnesium delayed-release capsules are indicated for the: Short-term treatment in the healing of erosive esophagitis (EE) in adults and pediatric patients 12 years to 17 years of age. ( 1.1 ) Maintenance of healing of EE in adults. ( 1.2 ) Short-term treatment of heartburn and other symptoms associated GERD in adults and pediatric patients 12 years to 17 years of age. ( 1.
Common Doses
- 20 mg
- 40 mg
- 1000 mg
- 500 mg
Dosage
2 DOSAGE AND ADMINISTRATION 1 A maximum dosage of 20 mg once daily is recommended for patients with severe liver impairment (Child-Pugh Class C). 2 Controlled studies do not extend beyond 6 months. 3 Refer to the amoxicillin and clarithromycin prescribing information for dosage adjustments in elderly and renally-impaired patients. 4 A starting dosage of 20 mg twice daily is recommended for patients with severe liver impairment (Child-Pugh Class C). Population Recommended Adult ( 2.1 ) and Pediatric Dosage ( 2.
Contraindications
- 4 CONTRAINDICATIONS Esomeprazole magnesium delayed-release capsules are contraindicated in patients with known hypersensitivity to substituted benzimidazoles or to any component of the formulation. Hypersensitivity reactions may include anaphylaxis, anaphylactic shock, angioedema, bronchospasm, acute tubulointerstitial nephritis, and urticaria [see Warnings and Precautions (5.2) , Adverse Reactions (6.2) ]. For information about contraindications of amoxicillin and clarithromycin, indicated in combination with esomeprazole magnesium delayed-release capsules for H.
Side Effects
- 6 ADVERSE REACTIONS The following serious adverse reactions are described below and elsewhere in labeling: Acute Tubulointerstitial Nephritis [see Warnings and Precautions (5.2) ] Clostridium difficile -Associated Diarrhea [see Warnings and Precautions (5.3) ] Bone Fracture [see Warnings and Precautions (5.4) ] Severe Cutaneous Adverse Reactions [see Warnings and Precautions (5.5) ] Cutaneous and Systemic Lupus Erythematosus [see Warnings and Precautions (5.6) ] Cyanocobalamin (Vitamin B-12) Deficiency [see Warnings and Precautions (5.
Interactions
- 7 DRUG INTERACTIONS Tables 3 and 4 include drugs with clinically important drug interactions and interaction with diagnostics when administered concomitantly with esomeprazole and instructions for preventing or managing them. Consult the labeling of concomitantly used drugs to obtain further information about interactions with PPIs. Table 3: Clinically Relevant Interactions Affecting Drugs Co-Administered with Esomeprazole and Interaction with Diagnostics Antiretrovirals Clinical Impact: The effect of PPIs on antiretroviral drugs is variable.