Dolutegravir

12.1 Mechanism of Action TRIUMEQ and TRIUMEQ PD are a fixed-dose combination of the HIV‑1 antiretroviral agents abacavir, dolutegravir, and lamivudine [see Microbiology ( 12.4 )].

1 INDICATIONS AND USAGE TRIUMEQ and TRIUMEQ PD are indicated for the treatment of HIV-1 infection in adults and in pediatric patients aged at least 3 months and weighing at least 6 kg. Limitations of Use: TRIUMEQ and TRIUMEQ PD alone are not recommended in patients with resistance‑associated integrase substitutions or clinically suspected integrase strand transfer inhibitor (INSTI) resistance because the dose of dolutegravir in TRIUMEQ and TRIUMEQ PD is insufficient in these subpopulations. See full prescribing information for TIVICAY (dolutegravir). TRIUMEQ and TRIUMEQ PD are a combination of dolutegravir (integrase strand transfer inhibitor [INSTI]), abacavir, and lamivudine (both nucleoside analogue reverse transcriptase inhibitors) indicated for the treatment of HIV-1 infection in adults and in pediatric patients aged at least 3 months and weighing at least 6 kg. ( 1 ) Limitations of Use: TRIUMEQ and TRIUMEQ PD alone are not recommended in patients with resistance-associated integrase substitutions or clinically suspected INSTI resistance because the dose of dolutegravir in TRIUMEQ and TRIUMEQ PD is insufficient in these subpopulations. See the dolutegravir prescribing information. ( 1 )

2 DOSAGE AND ADMINISTRATION • Before initiating TRIUMEQ or TRIUMEQ PD, screen for the HLA‑B*5701 allele because TRIUMEQ and TRIUMEQ PD contain abacavir. ( 2.1 ). • Prior to or when initiating TRIUMEQ or TRIUMEQ PD, test patients for HBV infection. ( 2.2 ) • TRIUMEQ and TRIUMEQ PD may be taken with or without food. ( 2.4 , 2.5 ) • Adults: One tablet of TRIUMEQ daily. ( 2.4 ) ABC = abacavir, DTG = dolutegravir, 3TC = lamivudine. Pediatric Population Body Weight Number of Tablets (once daily) Recommended Daily Dose TRIUMEQ PD Tablets (6 kg to <25 kg) 6 kg to <10 kg 3 180 mg ABC, 15 mg DTG, and 90 mg 3TC 10 kg to <14 kg 4 240 mg ABC, 20 mg DTG, and 120 mg 3TC 14 kg to <20 kg 5 300 mg ABC, 25 mg DTG, and 150 mg 3TC 20 kg to <25 kg 6 360 mg ABC, 30 mg DTG, and 180 mg 3TC TRIUMEQ Tablets (≥25 kg) ≥25 kg 1 600 mg ABC, 50 mg DTG, and 300 mg 3TC • Do not substitute TRIUMEQ and TRIUMEQ PD on a milligram-per-milligram basis. ( 2.3 ) • If dosing with certain UGT1A or CYP3A inducers, then the recommended dolutegravir dosage regimen should be adjusted. See Table 2 for complete dosing recommendations. ( 2.6 ) • Because TRIUMEQ and TRIUMEQ PD are fixed-dose tablets and cannot be dose adjusted, TRIUMEQ and TRIUMEQ PD are not recommended in patients with creatinine clearance <30 mL/min and pediatric patients with a similar degree of renal impairment based on age-appropriate assessment of renal function, or patients with hepatic impairment. ( 2.7 , 4 ) 2.1 Screening for HLA−B*5701 Allele prior to Initiating TRIUMEQ Screen for the HLA‑B*5701 allele prior to initiating therapy with TRIUMEQ or TRIUMEQ PD [see Boxed Warning , Warnings and Precautions ( 5.1 )]. 2.2 Testing prior to or When Initiating Treatment with TRIUMEQ Prior to or when initiating TRIUMEQ or TRIUMEQ PD, test patients for HBV infection [see Warnings and Precautions ( 5.2 )] . 2.3 Overview of TRIUMEQ Dosage Forms TRIUMEQ is available in two dosage forms. Do not substitute TRIUMEQ tablets and TRIUMEQ PD tablets for oral suspension on a milligram-per-milligram basis due to differing pharmacokinetic profiles for the dolutegravir component [see Warnings and Precautions ( 5.7 ) , Clinical Pharmacology ( 12.3 )] . • TRIUMEQ tablets: 600 mg of abacavir, 50 mg of dolutegravir, and 300 mg of lamivudine. TRIUMEQ is recommended in adults and pediatric patients weighing at least 25 kg [see Dosage and Administration ( 2.4 , 2.5 )] . • TRIUMEQ PD tablets for oral suspension: 60 mg of abacavir, 5 mg of dolutegravir, and 30 mg of lamivudine. TRIUMEQ PD is recommended in pediatric patients weighing 6 kg to less than 25 kg [see Dosage and Administration ( 2.5 )] . • Because TRIUMEQ PD is a fixed-dose tablet and the dosage of individual components cannot be adjusted, it may lead to a suboptimal dosing for patients weighing ≥25 kg. TRIUMEQ PD is not recommended in patients weighing 25 kg or more [see Dosage and Administration ( 2.4 , 2.5 )] . 2.4 Recommended Dosage in Adults TRIUMEQ is a fixed-dose combination product containing 600 mg of abacavir, 50 mg of dolutegravir, and 300 mg of lamivudine. The recommended dosage regimen of TRIUMEQ in adults is one tablet once daily orally with or without food. Do not use TRIUMEQ PD in adults. 2.5 Recommended Dosage and Administration Instructions for Pediatric Patients Weighing at Least 6 kg The dosage and dosage form recommended for pediatric patients varies by weight as shown in Table 1 below. Table 1. Recommended Dosage of TRIUMEQ Tablets and TRIUMEQ PD Tablets for Oral Suspension in Pediatric Patients a TRIUMEQ is a fixed-dose combination product containing 600 mg of abacavir, 50 mg of dolutegravir, and 300 mg of lamivudine. b TRIUMEQ PD is a fixed-dose combination product containing 60 mg of abacavir, 5 mg of dolutegravir, and 30 mg of lamivudine. Body Weight TRIUMEQ Tablets a TRIUMEQ PD b Number of Tablets Total Daily Dose 6 kg to <10 kg Not recommended 3 tablets once daily 180 mg abacavir, 15 mg dolutegravir, and 90 mg lamivudine once daily 10 kg to <14 kg Not recommended 4 tablets once daily 240 mg abacavir, 20 mg dolutegravir, and 120 mg lamivudine once daily 14 kg to <20 kg Not recommended 5 tablets once daily 300 mg abacavir, 25 mg dolutegravir, and 150 mg lamivudine once daily 20 kg to <25 kg Not recommended 6 tablets once daily 360 mg abacavir, 30 mg dolutegravir, and 180 mg lamivudine once daily ≥25 kg 1 tablet once daily Not recommended 600 mg of abacavir, 50 mg of dolutegravir, and 300 mg of lamivudine Administer TRIUMEQ PD tablets for oral suspension with or without food. Instruct patients (or instruct caregivers) to fully disperse the tablets for oral suspension in 20 mL of drinking water (if using 4, 5, or 6 tablets for oral suspension) or 15 mL (if using 3 tablets for oral suspension) in the supplied cup; swirl the suspension so that no lumps remain. After full dispersion, administer the oral suspension within 30 minutes of mixing [see Instructions for Use] . Do not swallow the tablets for oral suspension whole, and do not

6 ADVERSE REACTIONS The following adverse reactions are discussed in other sections of the labeling: • Serious and sometimes fatal hypersensitivity reaction [see Boxed Warning , Warnings and Precautions ( 5.1 )] . • Exacerbations of hepatitis B [see Boxed Warning , Warnings and Precautions ( 5.3 )] . • Hepatotoxicity [see Warnings and Precautions ( 5.3 )] . • Lactic acidosis and severe hepatomegaly with steatosis [see Warnings and Precautions ( 5.4 )] . • Immune reconstitution syndrome [see Warnings and Precautions ( 5.6 )] . • Myocardial infarction [see Warnings and Precautions ( 5.8 )] . The most commonly reported adverse reactions of at least moderate intensity and incidence at least 2% (in those receiving TRIUMEQ) were insomnia, headache, and fatigue. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact ViiV Healthcare at 1-877-844-8872 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 with rates in the clinical trials of another drug and may not reflect the rates observed in clinical practice. Clinical Trials in Adults Serious and Fatal Abacavir-Associated Hypersensitivity Reactions: In clinical trials, serious and sometimes fatal hypersensitivity reactions have occurred with abacavir, a component of TRIUMEQ and TRIUMEQ PD [see Boxed Warning , Warnings and Precautions ( 5.1 )]. These reactions have been characterized by 2 or more of the following signs or symptoms: (1) fever; (2) rash; (3) gastrointestinal symptoms (including nausea, vomiting, diarrhea, or abdominal pain); (4) constitutional symptoms (including generalized malaise, fatigue, or achiness); (5) respiratory symptoms (including dyspnea, cough, or pharyngitis). Almost all abacavir hypersensitivity reactions include fever and/or rash as part of the syndrome. Other signs and symptoms have included lethargy, headache, myalgia, edema, arthralgia, and paresthesia. Anaphylaxis, liver failure, renal failure, hypotension, adult respiratory distress syndrome, respiratory failure, myolysis, and death have occurred in association with these hypersensitivity reactions. Physical findings have included lymphadenopathy, mucous membrane lesions (conjunctivitis and mouth ulcerations), and maculopapular or urticarial rash (although some patients had other types of rashes and others did not have a rash). There were reports of erythema multiforme. Laboratory abnormalities included elevated liver chemistries, elevated creatine phosphokinase, elevated creatinine, and lymphopenia and abnormal chest x‑ray findings (predominantly infiltrates, which were localized). Serious Dolutegravir Hypersensitivity Reactions: In clinical trials, hypersensitivity reactions have occurred with dolutegravir, a component of TRIUMEQ and TRIUMEQ PD [see Warnings and Precautions ( 5.1 )]. These hypersensitivity reactions have been characterized by rash, constitutional findings, and sometimes organ dysfunction, including liver injury. Additional Treatment-Emergent Adverse Drug Reactions (ADRs) with Use of TRIUMEQ: The safety assessment of TRIUMEQ is primarily based on the analyses of data from a randomized, international, multicenter, double-blind, active-controlled trial, SINGLE (ING114467) and supported by data in treatment-experienced, INSTI-naive subjects from SAILING (ING111762) and by data from other treatment-naive trials. See full prescribing information for TIVICAY. Treatment-Naive Subjects: In SINGLE, 833 adult subjects were randomized and received at least one dose of either dolutegravir (TIVICAY) 50 mg with fixed-dose abacavir and lamivudine (EPZICOM) once daily (n = 414) or fixed-dose efavirenz/emtricitabine/tenofovir (ATRIPLA) once daily (n = 419) (study treatment was blinded through Week 96 and open-label from Week 96 through Week 144). Through 144 weeks, the rate of adverse events leading to discontinuation was 4% in subjects receiving TIVICAY + EPZICOM and 14% in subjects receiving ATRIPLA once daily. Treatment‑emergent ADRs of moderate to severe intensity observed in at least 2% of subjects in either treatment arm of SINGLE are provided in Table 3 . Table 3. Treatment-Emergent Adverse Drug Reactions of at Least Moderate Intensity (Grades 2 to 4) and at Least 2% Frequency in Treatment-Naive Subjects in SINGLE (Week 144 Analysis) a Includes pooled terms: rash, rash generalized, rash macular, rash maculo-papular, rash pruritic, and drug eruption. Adverse Reaction TIVICAY + EPZICOM Once Daily (n = 414) ATRIPLA Once Daily (n = 419) Psychiatric Insomnia 3% 3% Depression 1% 2% Abnormal dreams <1% 2% Nervous System Dizziness <1% 5% Headache 2% 2% Gastrointestinal Nausea <1% 3% Diarrhea <1% 2% General Disorders Fatigue 2% 2% Skin and Subcutaneous Tissue Rash a <1% 6% Ear and Labyrinth Vertigo 0 2% Treatment-Experienced Subjects: SAILING is an international, double-blind trial in INSTI

7 DRUG INTERACTIONS Coadministration of TRIUMEQ or TRIUMEQ PD with other drugs can alter the concentration of other drugs and other drugs may alter the concentrations of TRIUMEQ or TRIUMEQ PD. The potential drug-drug interactions must be considered prior to and during therapy. ( 4 , 7 , 12.3 ) 7.1 Effect of Dolutegravir on the Pharmacokinetics of Other Agents In vitro, dolutegravir inhibited the renal organic cation transporters (OCT)2 (IC 50 = 1.93 microM) and multidrug and toxin extrusion transporter (MATE)1 (IC 50 = 6.34 microM). In vivo, dolutegravir inhibits tubular secretion of creatinine by inhibiting OCT2 and potentially MATE1. Dolutegravir may increase plasma concentrations of drugs eliminated via OCT2 or MATE1 (dofetilide, dalfampridine, and metformin) [see Contraindications ( 4 ), Drug Interactions ( 7.3 )] . In vitro, dolutegravir inhibited the basolateral renal transporters, organic anion transporter (OAT) 1 (IC 50 = 2.12 microM) and OAT3 (IC 50 = 1.97 microM). However, in vivo, dolutegravir did not alter the plasma concentrations of tenofovir or para-amino hippurate, substrates of OAT1 and OAT3. In vitro, dolutegravir did not inhibit (IC 50 >50 microM) the following: cytochrome P450 (CYP)1A2, CYP2A6, CYP2B6, CYP2C8, CYP2C9, CYP2C19, CYP2D6, CYP3A, uridine diphosphate (UDP)-glucuronosyl transferase (UGT)1A1, UGT2B7, P-glycoprotein (P-gp), breast cancer resistance protein (BCRP), bile salt export pump (BSEP), organic anion transporter polypeptide (OATP)1B1, OATP1B3, OCT1, or multidrug resistance protein (MRP)2, or MRP4. In vitro, dolutegravir did not induce CYP1A2, CYP2B6, CYP3A4. Based on these data and the results of drug interaction trials, dolutegravir is not expected to affect the pharmacokinetics of drugs that are substrates of these enzymes or transporters. In drug interaction trials, dolutegravir did not have a clinically relevant effect on the pharmacokinetics of the following drugs: tenofovir, methadone, midazolam, rilpivirine, and oral contraceptives containing norgestimate and ethinyl estradiol. Using cross-study comparisons to historical pharmacokinetic data for each interacting drug, dolutegravir did not appear to affect the pharmacokinetics of the following drugs: atazanavir, darunavir, efavirenz, etravirine, fosamprenavir, lopinavir, ritonavir, and boceprevir. 7.2 Effect of Other Agents on the Pharmacokinetics of Dolutegravir Dolutegravir is metabolized by UGT1A1 with some contribution from CYP3A. Dolutegravir is also a substrate of UGT1A3, UGT1A9, BCRP, and P-gp in vitro. Drugs that induce those enzymes and transporters may decrease dolutegravir plasma concentrations and reduce the therapeutic effect of dolutegravir. Coadministration of dolutegravir and other drugs that inhibit these enzymes may increase dolutegravir plasma concentrations. Etravirine significantly reduced plasma concentrations of dolutegravir, but the effect of etravirine was mitigated by coadministration of lopinavir/ritonavir or darunavir/ritonavir and is expected to be mitigated by atazanavir/ritonavir ( Table 6 ) [see Drug Interactions ( 7.3 ), Clinical Pharmacology ( 12.3 )] . In vitro, dolutegravir was not a substrate of OATP1B1 or OATP1B3. Darunavir/ritonavir, lopinavir/ritonavir, rilpivirine, tenofovir, boceprevir, prednisone, rifabutin, and omeprazole had no clinically significant effect on the pharmacokinetics of dolutegravir. 7.3 Established and Other Potentially Significant Drug Interactions There were no drug-drug interaction trials conducted with the abacavir, dolutegravir, and lamivudine fixed-dose combination tablets. Information regarding potential drug interactions with the individual components of TRIUMEQ and TRIUMEQ PD are provided below. These recommendations are based on either drug interaction trials or predicted interactions due to the expected magnitude of interaction and potential for serious adverse events or loss of efficacy. [See Contraindications ( 4 ), Clinical Pharmacology ( 12.3 ).] Table 6. Established and Other Potentially Significant Drug Interactions for Dolutegravir: Alterations in Dose May Be Recommended Based on Drug Interaction Trials or Predicted Interactions a See Clinical Pharmacology ( 12.3 ) Table 8 or Table 10 for magnitude of interaction. Concomitant Drug Class: Drug Name Effect on Concentration Clinical Comment HIV-1 Antiviral Agents Non-nucleoside reverse transcriptase inhibitor: Etravirine a ↓Dolutegravir Use of TRIUMEQ or TRIUMEQ PD with etravirine without coadministration of atazanavir/ritonavir, darunavir/ritonavir, or lopinavir/ritonavir is not recommended. Non-nucleoside reverse transcriptase inhibitor: Efavirenz a ↓Dolutegravir In adults and in pediatric patients weighing at least 25 kg , adjust dolutegravir dose to 50 mg twice daily. An additional 50-mg dose of TIVICAY should be taken, separated by 12 hours from TRIUMEQ. In pediatric patients weighing 6 to <25 kg , an additional weight-based dose of dolutegravir should be given separated by 12 hours from