TALICIA

TALICIA delayed-release capsules contain omeprazole magnesium, amoxicillin and rifabutin for oral administration. Omeprazole magnesium is included in the delayed-release component of the capsule, and amoxicillin and rifabutin are included in the immediate-release component of the capsule. Each delayed-release capsule contains: omeprazole 10 mg (equivalent to 10.3 mg of omeprazole magnesium) amoxicillin 250 mg (equivalent to 286.9 mg of amoxicillin trihydrate) rifabutin 12.5 mg Omeprazole magnesium is a proton pump inhibitor. Amoxicillin and rifabutin are antibacterial drugs. Each TALICIA delayed-release capsule contains the following inactive ingredients: crospovidone, FD&C Red 3, FD&C Yellow 6, gelatin, hydroxypropyl cellulose, hypromellose, magnesium stearate, mannitol-starch, methacrylic acid copolymer, meglumine, pregelatinized starch, silica, sodium bicarbonate, sodium lauryl sulfate, talc, titanium dioxide and triethyl citrate. Omeprazole Magnesium Omeprazole magnesium is a white to off-white powder with a melting point with degradation at 200 °C. The salt is slightly soluble (0.25 mg/mL) in water at 25 °C, and it is soluble in methanol. Omeprazole magnesium is 5-methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl) methyl] sulfinyl]benzimidazole, (RS) magnesium salt (2:1). Omeprazole magnesium has a molecular formula of (C 17 H 19 N 3 O 3 S) 2 Mg, and a molecular weight of 713.12. The structural formula is: Amoxicillin Amoxicillin is a semisynthetic antibacterial drug, an analog of ampicillin. Chemically it is (2 S ,5 R ,6 R )-6-[( R )-(-)-2- amino-2-( p -hydroxyphenyl)acetamido]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0] heptane-2-carboxylic acid trihydrate. Amoxicillin has a molecular formula of C 16 H 19 N 3 O 5 S•3 H 2 O, and a molecular weight of 419.45. The structural formula is: Rifabutin Rifabutin is a red-violet powder soluble in chloroform and methanol, sparingly soluble in ethanol, and very slightly soluble in water (0.19 mg/mL). Its log P value (the base 10 logarithm of the partition coefficient between n-octanol and water) is 3.2 (n-octanol/water). Rifabutin is (9S,12E,14S,15R,16S,17R,18R,19R,20S,21S,22E,24Z)-6-16,18,20-tetrahydroxy-1'-isobutyl-14-methoxy-7,9,15,17,19,21,25-heptamethylspiro [9,4-(epoxypentadeca[1,11,13]trienimino)-2H-furo[2',3':7,8]naphth[1,2-d] imidazole-2,4'-piperidine]-5,10,26-(3H,9H)-trione-16-acetate. Rifabutin has a molecular formula of C 46 H 62 N 4 O 11 , and a molecular weight of 847.02. The structural formula is: Rifabutin Chemical Structure Amoxicillin Chemical Structure Omeprazole Magnesium Chemical Structure

TALICIA is a three-drug combination of omeprazole, a proton pump inhibitor, amoxicillin, a penicillin-class antibacterial, and rifabutin, a rifamycin antibacterial, indicated for the treatment of Helicobacter pylori infection in adults. ( 1 ) To reduce the development of drug-resistant bacteria and maintain the effectiveness of TALICIA and other antibacterial drugs, TALICIA should be used only to treat or prevent infections that are proven or strongly suspected to be caused by bacteria. (1.2) 1.1 Helicobacter pylori Infection TALICIA is indicated for the treatment of Helicobacter pylori infection in adults [see Clinical Studies (14 ) ] . 1.2 Usage To reduce the development of drug-resistant bacteria and maintain the effectiveness of TALICIA and other antibacterial drugs, TALICIA should be used only to treat or prevent infections that are proven or strongly suspected to be caused by susceptible bacteria. When culture and susceptibility information are available, they should be considered in selecting or modifying antibacterial therapy. In the absence of such data, local epidemiology and susceptibility patterns may contribute to the empiric selection of therapy.

Administer four (4) TALICIA capsules three times daily (at least 4 hours apart, e.g., morning, mid-day, and evening) with food for 14 days. ( 2.1 ) Swallow whole. Do not crush or chew. ( 2.1 ) Do not take TALICIA with alcohol. ( 2.1 ) 2.1 Recommended Dosage Administer four (4) TALICIA capsules three times daily (at least 4 hours apart, e.g., morning, mid-day, and evening) with food for 14 days. Instruct patients to swallow the TALICIA capsules whole, with a full glass of water (8 ounces). Each dose (4 capsules) of TALICIA includes rifabutin 50 mg, amoxicillin 1,000 mg and omeprazole 40 mg. Do not crush or chew TALICIA capsules. Do not take TALICIA with alcohol. 2.2 Missed Doses If a dose is missed and the next dose is not within 4 hours, administer the missed dose as soon as possible. If a dose is missed and the next dose is within 4 hours, administer the missed dose as soon as possible and delay the next dose to ensure there are at least 4 hours between two doses.

Known hypersensitivity to omeprazole, amoxicillin or any other beta-lactam antibacterial drugs, rifabutin or any other rifamycin, or any component of TALICIA. ( 4.1 ) Rilpivirine-containing products. ( 4.2 ) Delavirdine. ( 4.3 ) Voriconazole. ( 4.4 ) 4.1 Hypersensitivity Reactions TALICIA is contraindicated in patients with known hypersensitivity to the components of TALICIA: amoxicillin [or other β-lactam antibacterial drugs (e.g., penicillins and cephalosporins)], omeprazole (or other benzimidazoles [e.g. proton pump inhibitors (PPIs) and anthelmintics]), rifabutin (or any other rifamycins), or to any other component of TALICIA. Hypersensitivity reactions may include anaphylaxis or Stevens Johnson Syndrome, anaphylactic shock, angioedema, bronchospasm, acute tubulointerstitial nephritis, rash and urticaria [see Warnings and Precautions (5.1 , 5.6 , 5.8 ), Adverse Reactions (6.1) ] . 4.2 Rilpivirine-containing Products Proton pump inhibitors (PPIs), including omeprazole (a component of TALICIA), are contraindicated in patients receiving rilpivirine-containing products [see Drug Interactions (7.1) ] . 4.3 Delavirdine The use of rifabutin (a component of TALICIA), is contraindicated in patients receiving delavirdine [see Drug Interactions (7.1) ] . 4.4 Voriconazole The use of rifabutin (a component of TALICIA), is contraindicated in patients receiving voriconazole [see Drug Interactions (7.1) ] .

The following serious adverse reactions are described below and elsewhere in labeling: Hypersensitivity Reactions [see Warnings and Precautions (5.1) ] Severe Cutaneous Adverse Reactions [see Warnings and Precautions (5.2) ] Drug-Induced Enterocolitis Syndrome (DIES) [see Warnings and Precautions (5.3) ] Clostridioides difficile -Associated Diarrhea [see Warnings and Precautions (5.4) ] Acute Tubulointerstitial Nephritis [see Warnings and Precautions (5.6) ] Cutaneous and Systemic Lupus Erythematosus [see Warnings and Precautions (5.8) ] Rash in Patients with Mononucleosis [see Warnings and Precautions (5.9) ] Uveitis [see Warnings and Precautions (5.10) ] Most common adverse reactions (≥1%) were diarrhea, headache, nausea, abdominal pain, chromaturia, rash, dyspepsia, oropharyngeal pain, vomiting, and vulvovaginal candidiasis. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact RedHill Biopharma Inc. at 1-833-ADRHILL (1-833-237-4455) or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch . 6.1 Clinical Trials Experience with TALICIA 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. The safety of TALICIA was assessed in adult patients who were screened and found to be positive for H. pylori infection in one active-controlled (Study 1) and one placebo-controlled (Study 2) clinical trial. Patients received TALICIA, amoxicillin and omeprazole, or placebo every eight hours for 14 consecutive days taken with food. A total of 305 patients received TALICIA in Studies 1 and 2, 227 patients received amoxicillin and omeprazole (as omeprazole magnesium) in Study 1, and 41 patients received placebo in Study 2. These patients had a mean age of 46.4 years (range 18 to 70 years); 62.3% were female, 80.3% were white with 64.2% Hispanic or Latino. Adverse Reactions Leading to Discontinuation Treatment discontinuation due to an adverse reaction occurred in 1% (4/305) of patients receiving TALICIA, <1% (1/227) of patients receiving amoxicillin and omeprazole, and 2% (1/41) of patients receiving placebo. Adverse reactions leading to discontinuation of TALICIA were nausea and vomiting, nausea, nasal congestion, and nasopharyngitis, in one patient each. Most Common Adverse Reactions Selected adverse reactions occurring in ≥1% of patients receiving TALICIA in Study 1 and 2 are described in Table 1 . Table 1: Selected Adverse Reactions Occurring in 1% or Greater of Patients Receiving TALICIA in Studies 1 and 2 a Headache includes: headache and migraine. b Abdominal pain includes: abdominal pain, abdominal pain upper, and abdominal pain lower. c Riboflavin was administered in Study 1 to prevent unintentional unblinding and may have contributed to under-reporting of chromaturia. d Rash includes: rash, rash maculo-papular, rash morbilliform, and urticaria. e Dyspepsia includes: dyspepsia and epigastric discomfort. f Vulvovaginal candidiasis includes: vulvovaginal candidiasis, vulvovaginal mycotic infection, fungal infection, and vaginal discharge + vulvovaginal burning sensation + vulvovaginal pruritus. Study 1 Study 2 Adverse Reaction TALICIA (N=228) n (%) Amoxicillin and Omeprazole (N=227) n (%) TALICIA (N=77) n (%) Placebo (N=41) n (%) Diarrhea 23 (10.1) 18 (7.9) 11 (14.3) 4 (9.8) Headache a 17 (7.5) 16 (7.0) 12 (15.6) 4 (9.8) Nausea 11 (4.8) 12 (5.3) 3 (3.9) 1 (2.4) Abdominal pain b 8 (3.5) 11 (4.8) 3 (3.9) 2 (4.9) Chromaturia c 0 0 10 (13.0) 1 (2.4) Rash d 6 (2.6) 2 (0.9) 4 (5.2) 0 Dyspepsia e 5 (2.2) 3 (1.3) 1 (1.3) 0 Vomiting 5 (2.2) 5 (2.2) 1 (1.3) 2 (4.9) Oropharyngeal pain 2 (0.9) 2 (0.9) 3 (3.9) 0 Vulvovaginal candidiasis f 5 (2.2) 5 (2.2) 0 0 6.2 Other Important Adverse Reactions from the Labeling of the Individual Components of TALICIA Additional adverse reactions that occurred in 1% or greater of patients treated with omeprazole or rifabutin alone in clinical trials were as follows: Omeprazole Flatulence, acid regurgitation, upper respiratory infection, constipation, dizziness, asthenia, back pain, and cough. Rifabutin Flatulence, asthenia, chest pain, fever, pain, leucopenia, anemia, anorexia, eructation, myalgia, insomnia, and taste perversion. The following selected adverse reactions occurred in less than 1% of patients treated with rifabutin alone: flu-like syndrome, hepatitis, hemolysis, arthralgia, myositis, dyspnea, skin discoloration, thrombocytopenia, pancytopenia, and jaundice. 6.3 Post-Marketing Experience with Components of TALICIA Because these reactions are voluntarily reported from a population of uncertain size, it is not always possible to reliably estimate their actual frequency or establish a causal relationship to drug exposure. Omeprazole Cardiovascular: angina, tachycardia, bradycardia, palpitations, elevated blood pressure, peripheral edema Endocrine: gynecomastia Gastrointestinal: pancreatitis including fatal pancreatitis, anorexia, irritable colon, fecal discoloration, mucosal atrophy of the tongue, stomatitis, abdominal swelling, dry mouth, microscopic colitis, fundic gland polyps, gastroduodenal carcinoids in patients with Zollinger-Ellison syndrome on long-term treatment as a manifestation of the underlying condition associated with such tumors Hepatic: fatal hepatic failure or necrosis, hepatic encephalopathy, hepatocellular disease, cholestatic disease, mixed hepatitis, jaundice Metabolism and Nutritional disorders: hypoglycemia, hypomagnesemia, with or without hypocalcemia and/or hypokalemia, hyponatremia, weight gain Musculoskeletal: muscle weakness, myalgia, muscle cramps, joint pain, leg pain, bone fracture. Nervous System/Psychiatric: depression, agitation, aggression, hallucinations, confusion, insomnia, nervousness, apathy, somnolence, anxiety, dream abnormalities, tremors, paresthesia, vertigo Respiratory: epistaxis Skin and subcutaneous tissue disorders: SCAR such as SJS, TEN, DRESS, AGEP, photosensitivity, urticaria, pruritus, petechiae, purpura, alopecia, dry skin, hyperhidrosis Special Senses: tinnitus, taste perversion Ocular: optic atrophy, optic neuritis, dry eye syndrome, ocular irritation, blurred vision, double vision Urogenital: hematuria, proteinuria, elevated serum creatinine, microscopic pyuria, urinary tract infection, glycosuria, urinary frequency, testicular pain, erectile dysfunction Hematologic: Agranulocytosis, hemolytic anemia, pancytopenia, neutropenia, anemia, thrombocytopenia, leukopenia, leukocytosis Amoxicillin Gastrointestinal: Drug-induced enterocolitis syndrome (DIES), black hairy tongue Liver: hepatic dysfunction, cholestatic jaundice, cholestasis, acute cytolytic hepatitis Renal: crystalluria [see Overdosage (10) ] Hemic and Lymphatic Systems: anemia, hemolytic anemia, thrombocytopenia, thrombocytopenic purpura, eosinophilia, leukopenia, and agranulocytosis Central Nervous System: hyperactivity, agitation, anxiety, insomnia, confusion, convulsions, aseptic meningitis, behavioral changes, and/or dizziness Skin and subcutaneous tissue disorders : SCAR, such as SJS, TEN, DRESS, and AGEP, and linear IgA bullous dermatosis. Rifabutin Blood and lymphatic system disorders: agranulocytosis, lymphopenia Skin and subcutaneous tissue disorders: SCAR, such as SJS, TEN, DRESS, and AGEP.

Components of TALICIA have the potential for clinically important drug interactions. See Full Prescribing Information for important drug interactions with TALICIA. ( 4 , 5.7 ) 7.1 Interactions with Other Drugs and Diagnostics Drug interaction studies with TALICIA have not been conducted. The drug interaction information described here is based on the prescribing information of individual TALICIA components: omeprazole, amoxicillin, and rifabutin. Rifabutin is a substrate and inducer of cytochrome P450 (CYP) 3A enzymes. Omeprazole is a substrate and an inhibitor of CYP2C19, and a substrate of CYP3A4. Co-administration of TALICIA and other drugs that are substrates, inhibitors, or inducers of these enzymes may alter concentrations of rifabutin/omeprazole or other co-administered drugs [See Table 2 below and Clinical Pharmacology (12.3) ]. Omeprazole magnesium is a PPI. Refer to the prescribing information of the drugs used concomitantly with TALICIA for further information on their interactions with PPIs. Table 2: Interactions with TALICIA When Co-Administered with Other Drugs and Diagnostics CYP2C19 or CYP3A4 Inducers Clinical Impact Decreased exposure of omeprazole when used concomitantly with strong inducers. Prevention or Management St. John’s Wort, rifampin : Avoid concomitant use with TALICIA [see Warnings and Precautions (5.7) ]. Ritonavir-containing products : See prescribing information for specific drugs. CYP2C19 or CYP3A4 Inhibitors Clinical Impact Increased blood levels of omeprazole and rifabutin. Prevention or Management Voriconazole : Concomitant use with TALICIA is contraindicated [see Contraindications (4) ] . Fluconazole, posaconazole and itraconazole : Avoid concomitant use with TALICIA. If coadministration cannot be avoided, monitor patients for rifabutin associated adverse events, and lack of anti-fungal efficacy. CYP2C19 Substrates (e.g., Clopidogrel, citalopram, cilostazol, phenytoin, diazepam) Clinical Impact Increased plasma concentrations of CYP2C19 substrate drugs or decreased/increased plasma concentrations of its active metabolite(s) [see Clinical Pharmacology (12.3) ] . Prevention or Management Clopidogrel : Consider use of alternative anti-platelet therapy [ see Warnings and Precautions (5.7) ] . Avoid concomitant use with TALICIA. Antiretrovirals/Protease Inhibitors Clinical Impact Antiretrovirals/protease inhibitors may increase rifabutin blood levels. The effect of PPIs (such as omeprazole in TALICIA) on antiretroviral drugs is variable. The clinical importance and the mechanisms behind these interactions are not always known. Decreased exposure of some antiretroviral drugs (e.g., rilpivirine, atazanavir, and nelfinavir) when used concomitantly with omeprazole may reduce antiviral effect and promote the development of drug resistance [see Clinical Pharmacology (12.3) ]. Increased exposure of other antiretroviral drugs (e.g., saquinavir) when used concomitantly with omeprazole may increase toxicity [see Clinical Pharmacology (12.3) ] . There are other antiretroviral drugs which do not result in clinically relevant interactions with omeprazole. Prevention or Management Delavirdine : Combination treatment with TALICIA and delavirdine is contraindicated [see Contraindications (4) ]. Rilpivirine-containing products : Concomitant use with TALICIA is contraindicated [see Contraindications (4) ]. Avoid concomitant use of TALICIA with amprenavir, indinavir, lopinavir/ritonavir, saquinavir/ritonavir, ritonavir, tipranavir/ritonavir, fosamprenavir/ritonavir, or nelfinavir [see Warnings and Precautions (5.7) ] . Other antiretrovirals: See prescribing information for specific antiretroviral drugs. Probenecid Clinical Impact Increased and prolonged blood levels of amoxicillin. Allopurinol Clinical Impact Increase in the incidence of rashes is reported in patients receiving both allopurinol and amoxicillin together compared to patients receiving amoxicillin alone. It is not known whether this potentiation of amoxicillin rashes is due to allopurinol or the hyperuricemia present in these patients. Prevention or Management Discontinue allopurinol at the first appearance of skin rash. Assess benefit-risk of continuing TALICIA treatment. Warfarin, and Other Oral Anticoagulants Clinical Impact Abnormal prolongation of prothrombin time (increased international normalized ratio [INR]) has been reported in patients receiving amoxicillin and oral anticoagulants and in patients receiving PPIs, including omeprazole, and warfarin concomitantly. Increases in INR and prothrombin time may lead to abnormal bleeding and even death. Prevention or Management Monitor INR and prothrombin time and adjust the dose of warfarin or other oral anticoagulants to maintain the desired level of anticoagulation. Methotrexate Clinical Impact Concomitant use of omeprazole with methotrexate (primarily at high doses) may elevate and prolong serum levels of methotrexate and/or its metabolite hydroxymethotrexate, possibly leading to methotrexate toxicities [see Warnings and Precautions (5.7) ] . Prevention or Management Avoid concomitant use of TALICIA in patients receiving high-dose methotrexate. Digoxin Clinical Impact Potential for increased digoxin blood levels [see Clinical Pharmacology (12.3) ] . Prevention or Management Monitor digoxin concentrations. Dose adjustment may be needed to maintain therapeutic drug concentrations. See digoxin prescribing information. Drugs Dependent on Gastric pH for Absorption (e.g., iron salts, erlotinib, dasatinib, nilotinib, mycophenolate mofetil, ketoconazole/itraconazole) Clinical Impact Omeprazole can alter the absorption of other drugs due to its effect of reducing intragastric acidity thereby increasing gastric pH. Prevention or Management Mycophenolate mofetil (MMF) : Use TALICIA with caution in transplant patients receiving MMF [see Clinical Pharmacology (12.3) ] . See the prescribing information of other drugs dependent on gastric pH for absorption. Tacrolimus Clinical Impact Potential for increased tacrolimus blood levels, especially in patients who are intermediate or poor metabolizers of CYP2C19. Prevention or Management Monitor tacrolimus whole blood levels and adjust dose as per the prescribing information for tacrolimus. Drugs Metabolized via the CYP450 Enzymes (e.g., cyclosporine, disulfiram) Clinical Impact Interactions are reported with omeprazole and other drugs metabolized via the CYP450 enzymes. Prevention or Management Monitor patients to determine if it is necessary to adjust the dosage of these other drugs when taken concomitantly with TALICIA. Oral Contraceptives Clinical Impact Concomitant use of amoxicillin and rifabutin with hormonal contraceptives may lead to loss of its efficacy due to lower estrogen reabsorption and decreased ethinylestradiol and norethindrone concentrations, respectively [see Warnings and Precautions (5.5) ] . Prevention or Management Patients should be advised to use additional or alternative non-hormonal methods of contraception. Diagnostic Investigations for Neuroendocrine Tumors Clinical Impact PPI-induced decrease in gastric acidity may lead to increased serum chromogranin A (CgA) levels, which may cause false positive results in diagnostics for neuroendocrine tumors [see Warnings and Precautions (5.11) ] . Prevention or Management Assess CgA levels at least 14 days after stopping TALICIA treatment and consider repeating the test if initial CgA levels are high. If serial tests are performed (e.g., for monitoring), the same commercial laboratory should be used for testing, as reference ranges between tests may vary. Urine Glucose Test Clinical Impact High urine concentrations of ampicillin or amoxicillin may result in false-positive reactions when using glucose tests based on the Benedict’s copper reduction reaction that determines the amount of reducing substances like glucose in the urine. Prevention or Management Glucose tests based on enzymatic glucose oxidase reactions should be used. Interaction with Secretin Stimulation Test Clinical Impact Hyper-response in gastrin secretion in response to secretin stimulation test may falsely suggest gastrinoma. Prevention or Management Test should be performed at least 14 days after stopping TALICIA treatment to allow gastrin levels to return to baseline. False Positive Urine Tests for Tetrahydrocannabinol (THC) Clinical Impact There have been reports of false positive urine screening tests for THC in patients receiving PPIs. Prevention or Management An alternative confirmatory method should be considered to verify positive results. Other Laboratory Tests Clinical Impact Following administration of ampicillin or amoxicillin to pregnant women, a transient decrease in plasma concentration of total conjugated estriol, estriol-glucuronide, conjugated estrone, and estradiol has been noted.