Esomeprazole Sodium

1 INDICATIONS AND USAGE Esomeprazole sodium for injection is a proton pump inhibitor (PPI) indicated for the: Short-term treatment of Gastroesophageal Reflux Disease (GERD) with erosive esophagitis (EE) in adults and pediatric patients 1 month to 17 years of age, as an alternative to oral therapy when oral esomeprazole is not possible or appropriate. ( 1.1 ) Risk reduction of rebleeding of gastric or duodenal ulcers following therapeutic endoscopy for acute bleeding gastric or duodenal ulcers in adults. ( 1.2 ) 1.1 Treatment of Gastroesophageal Reflux Disease (GERD) with Erosive Esophagitis (EE) Esomeprazole sodium for injection is indicated for the short-term treatment of GERD with EE in adults and pediatric patients 1 month to 17 years, inclusively as an alternative to oral therapy when oral esomeprazole is not possible or appropriate. 1.2 Risk Reduction of Rebleeding of Gastric or Duodenal Ulcers following Therapeutic Endoscopy in Adults Esomeprazole sodium for injection is indicated for risk reduction of rebleeding of gastric or duodenal ulcers following therapeutic endoscopy for acute bleeding gastric or duodenal ulcers in adults.

2 DOSAGE AND ADMINISTRATION GERD with Erosive Esophagitis. ( 2.1 ): •The recommended adult dosage is either 20 mg or 40 mg once daily by intravenous injection (no less than 3 minutes) or intravenous infusion (10 minutes to 30 minutes) for up to 10 days. •The recommended pediatric dosage is based upon age and weight. See full prescribing information. Risk Reduction of Rebleeding of Gastric and Duodenal Ulcers ( 2.2 ): •The recommended adult dosage is 80 mg administered as an intravenous infusion over 30 minutes, followed by a continuous infusion of 8 mg/hour for a total treatment duration of 72 hours. Dosage Adjustment for Hepatic Impairment ( 2.3 ): •See full prescribing information for dosage adjustment by severity of impairment and by indication. Preparation and Administration ( 2.4 , 2.5 ): •See full prescribing information for preparation and administration instructions by indication. 2.1 Dosage for GERD with EE Adult Patients The recommended adult dosage is either 20 mg or 40 mg esomeprazole sodium for injection given once daily by intravenous injection (over at least 3 minutes) or intravenous infusion (10 minutes to 30 minutes) for up to 10 days [see Dosage and Administration (2.4) ] . Pediatric Patients The recommended dosage for pediatric patients is based on age and body weight as shown in Table 1 below. Administer as an intravenous infusion over 10 to 30 minutes once daily for up to 10 days [see Dosage and Administration (2.4) ] . Table 1: Recommended Pediatric Dosage Regimen for GERD with EE Age and Body Weight Dosage Regimen 1 month to less than 1 year of age 0.5 mg/kg once daily 1 year to 17 years less than 55 kg 10 mg once daily 55 kg or greater 20 mg once daily Completion of Treatment The safety and effectiveness of esomeprazole sodium for injection for more than 10 days have not been demonstrated. As soon as oral therapy is possible or appropriate, discontinue intravenous therapy with esomeprazole sodium for injection and continue with oral esomeprazole therapy. 2.2 Dosage for Risk Reduction of Rebleeding of Gastric or Duodenal Ulcers following Therapeutic Endoscopy in Adults The recommended adult dosage is 80 mg esomeprazole sodium for injection administered as an intravenous infusion over 30 minutes followed by a continuous infusion of 8 mg/hour for a total treatment duration of 72 hours (i.e., includes initial 30-minute loading dose plus 71.5 hours of continuous infusion) [see Dosage and Administration (2.5) ] . Intravenous therapy is aimed solely at the acute initial management of bleeding gastric or duodenal ulcers and does not constitute full treatment. Administer oral acid-suppressive therapy following intravenous therapy for a full course of treatment. 2.3 Dosage Adjustment for Hepatic Impairment GERD with EE For patients with severe hepatic impairment (Child-Pugh Class C), the maximum dosage is 20 mg once daily [see Use in Specific Populations (8.6) ] . Risk Reduction of Rebleeding of Gastric or Duodenal Ulcers following Therapeutic Endoscopy in Adults For patients with mild to moderate hepatic impairment (Child-Pugh Classes A and B, respectively), administered 80 mg as an intravenous infusion over 30 minutes, followed by a continuous infusion of 6 mg/hour for 71.5 hours. For patients with severe hepatic impairment (Child-Pugh Class C), administered 80 mg as an intravenous infusion over 30 minutes, followed by a continuous infusion of 4 mg/hour for 71.5 hours [see Use in Specific Populations (8.6) ] . 2.4 Preparation and Administration Instructions for GERD with EE Do not administer esomeprazole sodium for injection concomitantly with any other medications through the same intravenous site and/or tubing. Oral antacids may be used during treatment with esomeprazole sodium for injection. Intravenous Injection Over At Least 3 Minutes in Adult Patients Reconstitute esomeprazole sodium for injection with 5 mL of 0.9% Sodium Chloride Injection, USP. Withdraw the desired dose of the reconstituted esomeprazole sodium for injection solution for a 20 mg or 40 mg dose. Discard any unused portion of esomeprazole sodium for injection solution remaining in the vial. Inspect the reconstituted esomeprazole sodium for injection solution visually for particulate matter and discoloration prior to and during administration. Administer as an intravenous injection over no less than 3 minutes. Flush the intravenous line with either 0.9% Sodium Chloride Injection, USP, Lactated Ringer’s Injection, USP or 5% Dextrose Injection, USP both prior to and after administration of esomeprazole sodium for injection. Intravenous Infusion Over 10 Minutes to 30 Minutes in Adult and Pediatric Patients Reconstitute the contents of one vial of esomeprazole sodium for injection with 5 mL of 0.9% Sodium Chloride Injection, USP, Lactated Ringer’s Injection, USP or 5% Dextrose Injection, USP. Further dilute the resulting solution with 45 mL of 0.9% Sodium Chloride Injection, USP, Lactated Ringer’s Injection, USP or 5% Dextrose Injection, USP to a final concentration of 0.8 mg/mL. Withdraw the desired dose of the reconstituted esomeprazole sodium for injection solution for an adult or pediatric dose. Discard any unused portion of esomeprazole sodium for injection solution remaining in the vial. Inspect the reconstituted esomeprazole sodium for injection solution visually for particulate matter and discoloration prior to and during administration. Administer intravenously over 10 minutes to 30 minutes. Flush the intravenous line with either 0.9% Sodium Chloride Injection, USP, Lactated Ringer’s Injection, USP or 5% Dextrose Injection, USP both prior to and after administration of esomeprazole sodium for injection. Storage Store the final (diluted) esomeprazole sodium for injection solution at room temperature up to 30°C (86°F) and administer within the designated time period as listed in Table 2 below. Table 2: Storage Time for Final (diluted) Esomeprazole Sodium for Injection Solution Diluent Administer within: 0.9% Sodium Chloride Injection, USP 12 hours Lactated Ringer’s Injection, USP 12 hours 5% Dextrose Injection, USP 6 hours 2.5 Preparation and Administration Instructions for Risk Reduction of Rebleeding of Gastric or Duodenal Ulcers in Adults Do not administer esomeprazole sodium for injection concomitantly with any other medications through the same intravenous site and/or tubing. Oral antacids may be used during treatment with esomeprazole sodium for injection. Loading Dose (80 mg) Reconstitute each of two 40 mg vials of esomeprazole sodium for injection with 5 mL of 0.9% Sodium Chloride Injection, USP. Further dilute the resulting solution in 100 mL 0.9% Sodium Chloride Injection, USP. Inspect the reconstituted esomeprazole sodium for injection solution visually for particulate matter and discoloration prior to and during administration. Administer intravenously over 30 minutes. Flush the intravenous line with either 0.9% Sodium Chloride Injection, USP, Lactated Ringer’s Injection, USP or 5% Dextrose Injection, USP both prior to and after administration of esomeprazole sodium for injection. Continuous Infusion Reconstitute each of two 40 mg vials of esomeprazole sodium for injection with 5 mL of 0.9% Sodium Chloride Injection, USP. Further dilute the reconstituted esomeprazole sodium for injection solution in 100 mL 0.9% Sodium Chloride Injection, USP. Inspect the reconstituted esomeprazole sodium for injection solution visually for particulate matter and discoloration prior to and during administration. Administer intravenously as a continuous infusion at a rate of 8 mg/hour for 71.5 hours. Flush the intravenous line with either 0.9% Sodium Chloride Injection, USP, Lactated Ringer’s Injection, USP or 5% Dextrose Injection, USP both prior to and after administration of esomeprazole sodium for injection. Storage Store the final (diluted) esomeprazole sodium for injection solution at room temperature up to 30°C (86°F) and administer within 12 hours.

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) ] Hypomagnesemia and Mineral Metabolism [see Warnings and Precautions (5.8) ] Fundic Gland Polyps [see Warnings and Precautions (5.12) ] Most common adverse reactions (≥1%) are: headache, flatulence, nausea, abdominal pain, injection site reaction, diarrhea, dry mouth, dizziness/vertigo, constipation and pruritus. (6.1) To report SUSPECTED ADVERSE REACTIONS, contact Eugia US LLC at 1-866-850-2876 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch . 6.1 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. Symptomatic GERD and EE Adults The safety of esomeprazole sodium for injection is based on results from clinical trials conducted in four different populations including healthy subjects (n=204) and patients with bleeding gastric or duodenal ulcers (n=375). The data described below reflect exposure to esomeprazole sodium for injection in 359 patients in actively-controlled trials: symptomatic GERD with or without a history of EE (n=199) and patients with EE (n=160). The population was 18 to 77 years of age; 45% Male, 52% Caucasian, 17% Black, 3% Asian, and 28% other race. Most patients received doses of either 20 or 40 mg either as an infusion or an injection. Adverse reactions occurring in at least 1% of patients are listed below in Table 3: Table 3: Adverse Reactions 1 in the Esomeprazole Sodium for Injection Group in Active Controlled Trials of Symptomatic GERD with or without EE 1 Incidence of at least 1% in the Esomeprazole sodium for injection group Adverse Reactions % of patients Esomeprazole sodium for injection (n=359) Headache 11 Flatulence 10 Nausea 6 Abdominal pain 6 Diarrhea 4 Mouth dry 4 Dizziness/vertigo 3 Constipation 3 Injection site reaction 2 Pruritus 1 Intravenous treatment with esomeprazole sodium for injection 20 and 40 mg-administered as an injection or as an infusion was found to have a safety profile similar to that of oral esomeprazole. Pediatrics A randomized, open-label, multi-national study to evaluate the pharmacokinetics of repeated intravenous doses of once daily esomeprazole sodium for injection in pediatric patients 1 month to 17 years old, inclusive was performed [see Clinical Pharmacology (12.3) ] . The safety results are consistent with the known safety profile of esomeprazole and no unexpected safety signals were identified. Risk Reduction of Rebleeding of Gastric or Duodenal Ulcers in Adults The data described in Table 4 below reflect exposure to esomeprazole sodium for injection in 375 patients who presented with endoscopically confirmed gastric or duodenal ulcer bleeding in a placebo-controlled trial. The population was 18 to 98 years old; 68% Male, 87% Caucasian, 1% Black, 7% Asian, and 4% other race. Following endoscopic hemostasis, patients received either placebo or 80 mg esomeprazole sodium for injection as an intravenous infusion over 30 minutes followed by a continuous infusion of 8 mg/hour for a total treatment duration of 72 hours. After the initial 72-hour period, all patients received an oral PPI for 27 days. Table 4: Adverse Reactions 1 Occurring within 72 Hours after Start of Treatment in Patients with Endoscopically Confirmed Bleeding Ulcers 1. Incidence ≥1% in the esomeprazole sodium for injection group and greater than placebo group 2. Injection site reactions included erythema, swelling, inflammation, pruritus, phlebitis, thrombophlebitis and superficial phlebitis. % of patients Esomeprazole sodium for injection (n=375) Placebo (n=389) Duodenal ulcer hemorrhage 4 4 Injection site reaction 2 4 1 Pyrexia 4 3 Cough 1 0.3 Dizziness 1 1 With the exception of injection site reactions described above, intravenous treatment with esomeprazole sodium for injection administered as an injection or as an infusion was found to have a safety profile similar to that of oral esomeprazole. 6.2 Postmarketing Experience The following adverse reactions have been identified during post-approval use of esomeprazole. 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. Blood and Lymphatic System Disorders : agranulocytosis, pancytopenia; Eye Disorders: blurred vision; Gastrointestinal Disorders: pancreatitis; stomatitis; microscopic colitis; fundic gland polyps; Hepatobiliary Disorders: hepatic failure, hepatitis with or without jaundice; Immune System Disorders: anaphylactic reaction/shock; systemic lupus erythematosus; Infections and Infestations: GI candidiasis; Metabolism and nutritional disorders: hypomagnesemia (may lead to hypocalcemia and/or hypokalemia) [see Warnings and Precautions (5.8) ] , hyponatremia; Musculoskeletal and Connective Tissue Disorders: muscular weakness, myalgia, bone fracture; Nervous System Disorders : hepatic encephalopathy, taste disturbance; Psychiatric Disorders: aggression, agitation, depression, hallucination; Renal and Urinary Disorders : interstitial nephritis; Reproductive System and Breast Disorders: gynecomastia, erectile dysfunction; Respiratory, Thoracic and Mediastinal Disorders: bronchospasm; Skin and Subcutaneous Tissue Disorders: alopecia, erythema multiforme, hyperhidrosis, photosensitivity, Stevens-Johnson syndrome, toxic epidermal necrolysis (TEN, some fatal), drug reaction with eosinophilia and systemic symptoms (DRESS), and acute generalized exanthematous pustulosis (AGEP), cutaneous lupus erythematosus. Adverse reactions associated with omeprazole may also be expected to occur with esomeprazole sodium for injection. See the full prescribing information for oral omeprazole for complete safety information.

12.3 Pharmacokinetics Absorption The pharmacokinetics of esomeprazole in healthy subjects following administration of esomeprazole sodium for injection 20 mg and 40 mg once daily as intravenous infusion over 30 minutes for 5 days are shown in Table 8. Table 8: Geometric Mean (95% CI) Pharmacokinetic Parameters of Esomeprazole Sodium for Injection Following Dosing for 5 Days Parameter Esomeprazole sodium for injection 20 mg (n=24) Esomeprazole sodium for injection 40 mg (n=38) AUC (micromol*h/L) 5.1 (4.0:6.6) 16.2 (14.5:18.2) C max (micromol/L)) 3.9 (3.2:4.7) 7.5 (6.9:8.1) t 1/2 (h) 1.1 (0.9:1.2) 1.4 (1.3:1.5) Following intravenous administration of esomeprazole sodium for injection in 24 healthy subjects as a loading dose of 80 mg over 30 minutes followed by a continuous infusion of 8 mg/hour for 23.5 hours (for a total of 24 hours), esomeprazole pharmacokinetic parameters [geometric mean value (95% CI)] were as follows: AUC t 111.1 micromol*h/L (100.5, 122.7 micromol*h/L), C max 15.0 micromol/L (13.5, 16.6 micromol/L), and steady state plasma concentration (Css) 3.9 micromol/L (3.5, 4.5 micromol/L). In another study of healthy Caucasian subjects administered the same treatment regimen. Esomeprazole is a time-dependent inhibitor of CYP2C19, resulting in autoinhibition and nonlinear pharmacokinetics. The systemic exposure increases in a more than dose proportional manner after multiple oral doses of esomeprazole. Compared to the first dose, the systemic exposure (C max and AUC 0-24h ) at steady state following once a day dosing increased by 43% and 90%, respectively, compared to after the first dose for the 20 mg dose and increased by 95% and 159%, respectively, for the 40 mg dose. Distribution Esomeprazole is 97% bound to plasma proteins. Plasma protein binding is constant over the concentration range of 2 to 20 micromol/L. The apparent volume of distribution at steady state in healthy subjects is approximately 16 L. Elimination Metabolism Esomeprazole is extensively metabolized in the liver by the cytochrome P450 (CYP) enzyme system. The metabolites of esomeprazole lack antisecretory activity. The major part of esomeprazole’s metabolism is dependent upon the CYP2C19 isoenzyme, which forms the hydroxy and desmethyl metabolites. The remaining amount is dependent on CYP3A4 which forms the sulphone metabolite. Excretion Esomeprazole is excreted as metabolites primarily in urine but also in feces. Less than 1% of parent drug is excreted in the urine. Esomeprazole is completely eliminated from plasma, and there is no accumulation during once daily administration. The plasma elimination half-life of esomeprazole following intravenous administration of esomeprazole sodium for injection is approximately 1.1 to 1.4 hours and is prolonged with increasing doses. The plasma clearance (CL) is approximately 5.9 to 7.2 L/h during administration of esomeprazole sodium for injection as an intravenous infusion of 80 mg over 30 minutes followed by a continuous infusion of 8 mg/hour for 23.5 hours. Specific Populations Geriatric Patients The AUC and C max values of esomeprazole were slightly higher (25% and 18%, respectively) in the elderly as compared to younger subjects at steady state. This increase in exposure is not considered clinically relevant. Pediatric Patients The pharmacokinetics of esomeprazole were evaluated in 50 pediatric patients birth to 17 years of age, inclusive (of which 44 pediatric patients were 1 month to 17 years) in a randomized, open-label, multi-national, multiple dose study of 20 mg esomeprazole sodium for injection administered as a once-daily 3-minute intravenous injection. Esomeprazole plasma AUC values were 183% and 60% higher in pediatric patients aged 6 to 11 years and 12 to 17 years, respectively, compared to adults. Subsequent pharmacokinetic analyses predicted the following dosage regimens would achieve comparable steady-state plasma exposures (AUC 0-24 ) to those observed in adult patients administered 20 mg of esomeprazole sodium for injection once daily: 0.5 mg/kg once daily for pediatric patients 1 month to 11 months of age, 10 mg once daily for pediatric patients 1 year to 17 years with body weight less than 55 kg, and 20 mg once daily for pediatric patients 1 year to 17 years with body weight of 55 kg and greater. Increasing the infusion duration from 3 minutes to 10 minutes or 30 minutes was predicted to produce steady-state C max values that were comparable to those observed in adult patients at the 40 mg and 20 mg esomeprazole sodium for injection doses, respectively [see Use in Specific Populations (8.4) ] . Male and Female Patients The AUC and C max values of esomeprazole were slightly higher (13%) in females than in males at steady state when dosed orally. Similar differences have been seen for intravenous administration of esomeprazole. This increase in exposure is not considered clinically relevant. Patients with Renal Impairment The pharmacokinetics of esomeprazole in patients with renal impairment are not expected to be altered relative to healthy subjects as less than 1% of esomeprazole is excreted unchanged in urine. Patients with Hepatic Impairment The steady state pharmacokinetics of esomeprazole obtained after administration of 40 mg orally once daily to 4 patients each with mild (Child-Pugh Class A), moderate (Child-Pugh Class B), and severe (Child-Pugh Class C) hepatic impairment were compared to those obtained in 36 male and female GERD patients with normal liver function. In patients with mild and moderate hepatic impairment, the AUCs were within the range that could be expected in patients with normal liver function. In patients with severe hepatic impairment, the AUCs were 2 to 3 times higher than in the patients with normal liver function [see Use in Specific Populations (8.6) ] . There are no pharmacokinetic data available for esomeprazole administered as continuous intravenous administration in patients with liver impairment. The pharmacokinetics of intravenous omeprazole 80 mg infused over 30 minutes, followed by 8 mg/hour over 47.5 hours in patients with mild (Child-Pugh Class A; n=5), moderate (Child-Pugh Class B; n=4) and severe (Child-Pugh Class C; n=3) liver impairment were compared to those obtained in 24 male and female healthy subjects. In patients with mild and moderate liver impairment, omeprazole clearance and steady state plasma concentration was approximately 35% lower and 50% higher, respectively, than in healthy subjects. In patients with severe liver impairment, the omeprazole clearance was 50% of that in healthy subjects and the steady state plasma concentration was double that in healthy subjects [see Use in Specific Populations (8.6) ] . Drug Interaction Studies Effect of Esomeprazole/Omeprazole on Other Drugs In vitro and in vivo studies have shown that esomeprazole is not likely to inhibit CYPs 1A2, 2A6, 2C9, 2D6, 2E1 and 3A4. Antiretrovirals For some antiretroviral drugs, such as rilpivirine, atazanavir and nelfinavir, decreased serum concentrations have been reported when given together with omeprazole [see Drug Interactions (7) ]. Rilpivirine: Following multiple doses of rilpivirine (150 mg, daily) and omeprazole (20 mg, daily), AUC was decreased by 40%, C max by 40%, and C min by 33% for rilpivirine [see Contraindications (4) ] . Nelfinavir: Following multiple doses of nelfinavir (1,250 mg, twice daily) and omeprazole (40 mg daily), AUC was decreased by 36% and 92%, C max by 37% and 89% and C min by 39% and 75% respectively for nelfinavir and M8. Atazanavir: Following multiple doses of atazanavir (400 mg, daily) and omeprazole (40 mg, daily, 2 hours before atazanavir), AUC was decreased by 94%, C max by 96%, and C min by 95%. Saquinavir: Following multiple dosing of saquinavir/ritonavir (1,000/100 mg) twice daily for 15 days with omeprazole 40 mg daily co-administered days 11 to 15. The AUC was increased by 82%, C max by 75%, and C min by 106%. The mechanism behind this interaction is not fully elucidated. Clopidogrel In a crossover study, healthy subjects were administered clopidogrel (300 mg loading dose followed by 75 mg per day as the maintenance dosage for 28 days) alone and with esomeprazole (40 mg orally once daily at the same time as clopidogrel) for 29 days. Exposure to the active metabolite of clopidogrel was reduced by 35% to 40% over this time period when clopidogrel and esomeprazole were administered together. Pharmacodynamic parameters were also measured and demonstrated that the change in inhibition of platelet aggregation was related to the change in the exposure to clopidogrel active metabolite [see Warnings and Precautions (5.7) , Drug Interactions (7) ] . Mycophenolate Mofetil Administration of omeprazole 20 mg twice daily for 4 days and a single 1,000 mg dose of MMF approximately one hour after the last dose of omeprazole to 12 healthy subjects in a cross-over study resulted in a 52% reduction in the C max and 23% reduction in the AUC of MPA [see Drug Interactions (7) ] . Cilostazol Omeprazole acts as an inhibitor of CYP2C19. Omeprazole, given in doses of 40 mg daily for one week to 20 healthy subjects in cross-over study, increased C max and AUC of cilostazol by 18% and 26% respectively. The C max and AUC of one of the active metabolites, 3,4-dihydro-cilostazol, which has 4 to 7 times the activity of cilostazol, were increased by 29% and 69%, respectively. Co-administration of cilostazol with omeprazole is expected to increase concentrations of cilostazol and the above mentioned active metabolite [see Drug Interactions (7) ] . Diazepam Co-administration of esomeprazole 30 mg and diazepam, a CYP2C19 substrate, resulted in a 45% decrease in clearance of diazepam. Increased plasma levels of diazepam were observed 12 hours after dosing and onwards. However, at that time, the plasma levels of diazepam were below the therapeutic interval, and thus this interaction is unlikely to be of clinical relevance. Digoxin Concomitant administration of omeprazole 20 mg once daily and digoxin in healthy subjects increased the bioavailability of digoxin by 10% (30% in two subjects) [see Drug Interactions (7) ] . Other Drugs Concomitant administration of esomeprazole and either naproxen (non-selective NSAID) did not identify any clinically relevant changes in the pharmacokinetic profiles of these NSAIDs. Effect of Other Drugs on Esomeprazole/Omeprazole St. John’s Wort In a cross-over study in 12 healthy male subjects, St. John’s Wort (300 mg three times daily for 14 days) significantly decreased the systemic exposure of omeprazole in CYP2C19 poor metabolizers (C max and AUC decreased by 37.5% and 37.9%, respectively) and extensive metabolizers (C max and AUC decreased by 49.6% and 43.9%, respectively) [see Drug Interactions (7) ] . Voriconazole Concomitant administration of omeprazole and voriconazole (a combined inhibitor of CYP2C19 and CYP3A4) resulted in more than doubling of the omeprazole exposure. When voriconazole (400 mg every 12 hours for one day, followed by 200 mg once daily for 6 days) was given with omeprazole (40 mg once daily for 7 days) to healthy subjects, the steady-state C max and AUC 0-24 of omeprazole significantly increased: an average of 2 times (90% CI: 1.8, 2.6) and 4 times (90% CI: 3.3, 4.4), respectively, as compared to when omeprazole was given without voriconazole [see Drug Interactions (7) ] . Other Drugs Co-administration of esomeprazole with oral contraceptives, diazepam, phenytoin, quinidine, naproxen (non-selective NSAID) did not seem to change the pharmacokinetic profile of esomeprazole.