Lenacapavir (Systemic)
Brand names: Sunlenca
Drug class:
Antineoplastic Agents
Usage of Lenacapavir (Systemic)
Treatment of HIV Infection
Treatment of HIV-1 infection in heavily treatment-experienced adults with multidrug resistant HIV-1 infection failing their current antiretroviral regimen due to resistance, intolerance, or safety considerations. Used in combination with other antiretrovirals.
Current guidelines on the treatment of HIV in adults include lenacapavir among other agents with a novel mechanism of action that can be used as part of a new treatment regimen following virologic failure of an existing regimen; consult guidelines for the most current information on recommended regimens.
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How to use Lenacapavir (Systemic)
General
Pretreatment Screening
Patient Monitoring
Administration
Administered orally and by sub-Q injection. Use the oral formulation as part of the initiation regimen only; not intended for long-term maintenance dosing.
Oral Administration
Administer with or without food.
Sub-Q Administration
Administer sub-Q lenacapavir by a trained medical professional. Administer into the abdomen at least 2 inches from the navel. Two 1.5 mL injections required for a complete dose; give each injection at a different site on the abdomen.
Supplied in a dosing kit containing 2 single-dose vials of lenacapavir (each containing 463.5 mg/1.5 mL of lenacapavir), 2 vial access devices, 2 disposable syringes, and 2 injection safety needles. Contents of the injection kits are for single use only. Injection solution should appear clear and yellow with no visible particles. Do not use if solution is discolored or contains particles. Use provided vial access devices to withdraw medication from the vials into the syringes for administration. Consult the prescribing information for detailed preparation and administration instructions.
Dosage
Adults
Treatment of HIV Infection Oral, then Sub-QInitiate using 1 of 2 initiation dosage regimens, then begin once every 6-months maintenance dosing (See Table 1).
Table 1. Initiation and Maintenance Dosage Regimens for Lenacapavir1Initiation Dosage Regimen Option 1
Day 1: 927 mg by sub-Q injection (2 × 1.5 mL injections) and 600 mg orally (2 × 300 mg tablets
Day 2: 600 mg orally (2 x 300 mg tablets)
Initiation Dosage Regimen Option 2
Day 1: 600 mg orally (2 x 300 mg tablets)
Day 2: 600 mg orally (2 x 300 mg tablets)
Day 8: 300 mg orally (1 x 300 mg tablet)
Day 15: 927 mg by sub-Q injection (2 x 1.5 mL injections)
Maintenance Dosage
927 mg by sub-Q injection (2 × 1.5 mL injections) every 6 months (26 weeks) from the date of the last injection +/-2 weeks
During the maintenance period, if more than 28 weeks have elapsed since the last injection and if clinically appropriate to continue lenacapavir treatment, restart the initiation dosage regimen from day 1 using one of the recommended initation regimens.
Special Populations
Hepatic Impairment
No dosage adjustment for mild or moderate hepatic impairment (Child-Pugh Class A or B); not evaluated in severe hepatic impairment (Child-Pugh Class C).
Renal Impairment
No dosage adjustment for mild, moderate, or severe renal impairment (estimated Clcr ≥15 mL/minute); not evaluated in end stage renal disease (estimated Clcr<15 mL/minute).
Geriatric Use
No specific dosage recommendations.
Warnings
Contraindications
Warnings/Precautions
Immune Reconstitution Syndrome
Immune reconstitution syndrome reported in patients treated with combination antiretroviral therapy. During the initial phase of combination antiretroviral treatment, patients whose immune system responds may develop an inflammatory response to indolent or residual opportunistic infections [such as Mycobacterium avium infection, cytomegalovirus, Pneumocystis jirovecii pneumonia (PCP), or tuberculosis], which may necessitate further evaluation and treatment.
Autoimmune disorders (such as Graves' disease, polymyositis, Guillain-Barré syndrome, and autoimmune hepatitis) have also been reported in the setting of immune reconstitution; however, time to onset is more variable, and can occur many months after initiation of treatment.
Long-acting Properties and Potential Associated Risks with Lenacapavir
Residual concentrations of lenacapavir may remain in systemic circulation for prolonged periods (up to 12 months or longer after the last sub-Q dose). Counsel patients that maintenance dosing by injection is required every 6 months; missed doses or non-adherence to injections could lead to loss of virologic response and development of resistance.
Lenacapavir, a moderate CYP3A inhibitor, may increase exposure to, and therefore potential risk of adverse reactions from, drugs primarily metabolized by CYP3A initiated within 9 months after the last sub-Q dose of lenacapavir.
If lenacapavir is discontinued, initiate an alternative, fully suppressive antiretroviral regimen where possible no later than 28 weeks after the final injection of lenacapavir. If virologic failure occurs during treatment, switch the patient to an alternative regimen if possible.
Injection Site Reactions
Sub-Q administration of lenacapavir may result in local injection site reactions including swelling, pain, erythema, nodule, induration, pruritus, extravastion, or mass. If clinically significant injection site reactions occur, evaluate and institute appropriate therapy and follow-up. Nodules and indurations at the injection site may take longer to resolve than other injection site reactions.
Specific Populations
PregnancyEnroll pregnant patients in the Antiretroviral Pregnancy Registry at 1-800-258-4263.
Insufficient human data on the use of lenacapavir during pregnancy exist to inform a drug-associated risk of birth defects and miscarriage. In animal reproduction studies, no adverse developmental effects were observed when lenacapavir was administered to rats and rabbits at exposures (AUC) ≥16 times the exposure in humans at the recommended human dose of lenacapavir.
LactationNot known whether lenacapavir is present in human breast milk, affects human milk production, or has effects on the breastfed infant. Animal data indicate low levels of lenacapavir in plasma of nursing rat pups.
The Centers for Disease Control and Prevention recommend that HIV-1-infected patients in the United States not breastfeed their infants to avoid risking postnatal transmission of HIV-1 infection. Because of the potential for HIV transmission (in HIV-negative infants), development of viral resistance (in HIV-positive infants), and adverse reactions in a breastfed infant similar to those seen in adults, instruct patients not to breastfeed if they are receiving lenacapavir.
Pediatric UseSafety and efficacy not established.
Geriatric UseSufficient numbers of patients ≥65 years of age not evaluated in clinical studies.
Renal ImpairmentPharmacokinetics of lenacapavir not significantly impacted by severe renal impairment (Clcr 15 to <30 mL/minute). No dosage adjustment of lenacapavir recommended in patients with Clcr ≥15 mL/minute. Not studied in patients with estimated Clcr <15 mL/minute.
Hepatic ImpairmentPharmacokinetics of lenacapavir not significantly impacted by moderate hepatic impairment (Child-Pugh Class B). No dosage adjustment recommended in patients with mild (Child-Pugh Class A) or moderate (Child-Pugh Class B) hepatic impairment. Not studied in patients with severe hepatic impairment (Child-Pugh Class C).
Common Adverse Effects
Most common adverse reactions (≥3%): nausea, injection site reactions.
What other drugs will affect Lenacapavir (Systemic)
Substrate of CYP3A, P-glycoprotein (P-gp), and UGT1A1; moderate inhibitor of CYP3A; and inhibitor of P-gp and breast cancer resistance protein (BCRP).
Not a substrate, inducer, or inhibitor of CYP1A2, CYP2B6, CYP2C8, CYP2C9, CYP2C19, or CYP2D6. Not an inducer of CYP3A4 or an inhibitor of UGT1A1. Not an inhibitor of organic anion transporting polypeptide (OATP), organic anion transporter (OAT) 1, OAT3, organic cation transporter (OCT) 1, OCT2, multidrug and toxin extrusion transporter (MATE) 1, or MATE 2-K. Not a substrate of BCRP, OATP1B1, or OATP1B3.
Drugs Affecting or Metabolized by Hepatic Microsomal Enzymes
Strong or Moderate CYP3A Inducers
Strong or moderate CYP3A inducers may significantly decrease lenacapavir plasma concentrations, which may result in loss of therapeutic effect and development of resistance. Concomitant administration of strong CYP3A inducers and lenacapavir contraindicated. Concomitant administration of moderate CYP3A inducers and lenacapavir not recommended.
Combined P-gp, UGT1A1, and Strong CYP3A Inhibitors
Combined P-gp, UGT1A1, and strong CYP3A inhibitors may significantly increase lenacapavir plasma concentrations. Concomitant administration of these agents and lenacapavir not recommended.
Drugs Primarily Metabolized by CYP3A
Lenacapavir is a moderate inhibitor of CYP3A. Due to its long half-life following sub-Q administration, lenacapavir may increase the exposure and risk of adverse effects of drugs primarily metabolized by CYP3A initiated within 9 months after the last sub-Q dose of lenacapavir. Dosage adjustments of the CYP3A substrate may be needed.
Specific Drugs
Drug
Interaction
Comments
Anticonvulsants (Carbamazepine, oxcarbazepine, phenobarbital, phenytoin)
Decreased lenacapavir concentrations, leading to loss of therapeutic effect and development of resistance
Co-administration with carbamazepine or phenytoin contraindicated
Co-administration with oxcarbazepine or phenobarbital not recommended; consider use of alternative anticonvulsants
Antimycobacterials (rifampin, rifabutin, rifapentine)
Decreased lenacapavir concentrations, leading to loss of therapeutic effect and development of resistance
Co-administration with rifampin contraindicated
Co-administration with rifabutin or rifapentine not recommended
Antiretrovirals (atazanavir/cobicistat, atazanavir/ritonavir, efavirenz, Nevirapine, tipranavir/ritonavir)
Atanazavir/cobicistat, atazanavir/ritonavir; increased lenacapavir concentrations
Efavirenz, nevirapine, tipranavir/ritonavir: decreased lenacapavir concentrations, leading to loss of therapeutic effect and development of resistance
No clinically significant interaction observed with darunavir/cobicistat, cobicistat, or Tenofovir alafenamide
Corticosteroids, systemic (Dexamethasone, hydrocortisone, cortisone)
Increased corticosteroid concentrations; increased risk of Cushing's syndrome and adrenal suppression.
Initiate with lowest corticosteroid dose and titrate carefully while monitoring for safety
Digoxin
Increased digoxin concentrations
Use with caution and monitor digoxin therapeutic concentrations
Direct oral anticoagulants (DOACs) (rivaroxaban, dabigatran, edoxaban)
Increased DOAC concentrations
Refer to the DOAC prescribing information for recommendations on concomitant administration with combined moderate CYP3A and P-gp inhibitors
Ergot derivatives (dihydroergotamine, ergotamine, methylergonovine)
Increased concentrations of ergot derivatives
Co-administration not recommended
HMG-CoA reductase inhibitors (lovastatin, simvastatin)
Increased concentrations of lovastatin or simvastatin
No clinically significant interactions have been observed between lenacapavir and pitavastatin or rosuvastatin
Initiate lovastatin or simvastatin with the lowest starting dose and titrate while monitoring for safety (e.g., myopathy)
Naloxegol
Increased concentrations of naloxegol
Avoid concomitant use; if unavoidable, decrease dosage of naloxegol and monitor for adverse reactions
Opioid analgesics (Buprenorphine, fentanyl, methadone, oxycodone, tramadol)
Fentanyl, oxycodone: increased concentrations of narcotics metabolized by CYP3A
Tramadol: increased tramadol concentrations
Burpenorphine, methadone: unknown effect on concentrations
Fentanyl, oxycodone: monitor therapeutic effects and adverse reactions (e.g., respiratory depression)
Tramadol: dosage reduction may be needed
Buprenorphine, methadone: when initiating analgesic, titrate carefully and use the lowest feasible initial or maintenance dose. When initiating lenacapavir, dosage adjustment of opioid analgesic may be needed; monitor clinical signs and symptoms
Phosphodiesterase (PDE-5) inhibitors (sildenafil, tadalafil, vardenafil)
Increased concentrations of PDE-5 inhibitors
For pulmonary arterial hypertension (PAH): co-administration with tadalafil is not recommended
For erectile dysfunction: refer to prescribing information of the PDE-5 inhibitors for dosage recommendations
Sedative/hypnotics (midazolam [oral], triazolam)
Increased concentrations of orally administered midazolam and triazolam
Use with caution when co-administered
St. John's Wort
Decreased lenacapavir concentrations
Co-administration contraindicated
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- empagliflozin-linagliptin
- encourage foundation for enbrel
- qulipta drug interactions