Lybalvi

— THERAPEUTIC CATEGORIES —
  • Mood disorders
  • Psychosis

Lybalvi Generic Name & Formulations

General Description

Olanzapine, samidorphan; 5mg/10mg, 10mg/10mg, 15mg/10mg, 20mg/10mg; tabs.

Pharmacological Class

Atypical antipsychotic + opioid antagonist.

How Supplied

Tabs—7, 30, 90

How Supplied

Tablets

  • 5mg/10mg (olanzapine/samidorphan): Yellow, capsule-shaped; marked with “OS” and “5”—7, 30, 90
  • 10mg/10mg (olanzapine/samidorphan): Orange, capsule-shaped; marked with “OS” and “10”—7, 30, 90
  • 15mg/10mg (olanzapine/samidorphan): Blue, capsule-shaped; marked with “OS” and “15”—7, 30, 9020mg/10mg (olanzapine/samidorphan): Pink, capsule-shaped; marked with “OS” and “20”—7, 30, 90

Storage

Store at room temperature 20°C to 25°C (68°F to 77°F) with excursions permitted between 15°C and 30°C (59°F and 86°F).

Store in the original bottle with desiccant. Keep bottle tightly closed and protect from moisture.

Manufacturer

Generic Availability

NO

Mechanism of Action

The mechanism of action of olanzapine is unclear; however, its efficacy in the treatment of schizophrenia or bipolar I disorder could be mediated through a combination of dopamine and serotonin type 2 (5HT2) antagonism. The mechanism of action of samidorphan could be mediated through opioid receptor antagonism.

Lybalvi Indications

Indications

Acute treatment of manic or mixed episodes in bipolar I disorder as monotherapy or as adjunct to lithium or valproate. Maintenance monotherapy for bipolar I disorder.

Lybalvi Dosage and Administration

Prior to Treatment Evaluations

Lybalvi is contraindicated in patients using opioids or undergoing acute opioid withdrawal. Delay initiation of Lybalvi in these patients for a minimum of 7 days after last use of short-acting opioids and 14 days after last use of long-acting opioids.

Adult

Monotherapy: initially 10mg/10mg or 15mg/10mg once daily. Adjust at intervals of at least 24hrs by increments/decrements of 5mg; max: 20mg/10mg once daily. Maintenance: 5mg/10mg, 10mg/10mg, 15mg/10mg, or 20mg/10mg once daily. Adjunctive to lithium/valproate: initially 10mg/10mg once daily. May adjust at weekly intervals of 5mg as tolerated; max: 20mg/10mg once daily. Patients with higher risk of hypotensive reactions, risk of slower olanzapine metabolism, or more sensitive to olanzapine: initially 5mg/10mg.

Children

Not established.

Administration

May take with or without food.

Do not divide tablets or combine strengths.

Lybalvi Contraindications

Contraindications

Current opioid use. Acute opioid withdrawal. If coadministered with lithium or valproate; refer to respective prescribing information.

Lybalvi Boxed Warnings

Boxed Warning

Increased mortality in elderly patients with dementia-related psychosis.

Lybalvi Warnings/Precautions

Warnings/Precautions

Elderly with dementia-related psychosis (not approved use); increased risk of death or cerebrovascular events (eg, stroke, TIA). Precipitation of severe opioid withdrawal in patients dependent on opioids; delay initiation for a minimum of 7 days after last use of short-acting opioids; or 14 days after last use of long-acting opioids. Risk of opioid overdose from attempts to overcome samidorphan blockade. Risk of resuming opioids in those with prior opioid use. Discontinue if neuroleptic malignant syndrome or if DRESS is suspected. Consider discontinuation if tardive dyskinesia occurs. Diabetes. Monitor for hyperglycemia, hyperlipidemia; do fasting blood glucose and lipids testing at beginning, and during therapy. Monitor for weight gain. Cardio- or cerebrovascular disease. Hypotension. Dehydration. Hypovolemia. Pre-existing low WBCs or history of leukopenia/neutropenia; monitor CBCs during 1st few months of treatment; discontinue if WBCs decline or severe neutropenia (ANC <1000/mm3) occurs. Perform fall risk assessments when initiating and recurrently on long-term therapy. Dysphagia. History of seizures. Conditions that lower the seizure threshold. Strenuous exercise. Exposure to extreme heat. Urinary retention. Significant prostatic hypertrophy. Constipation. History of paralytic ileus or related conditions. Breast cancer. Reevaluate periodically. Severe hepatic impairment. ESRD: not recommended. Neonates: risk of extrapyramidal and/or withdrawal symptoms post delivery (due to exposure during 3rd-trimester pregnancy). Pregnancy. Nursing mothers: monitor infants.

Warnings/Precautions

Increased Mortality, Cerebrovascular Adverse Reactions (Including Stroke) in Elderly Patients with Dementia-Related Psychosis

  • Lybalvi is not approved for the treatment of dementia-related psychosis
  • Antipsychotic use for dementia-related psychosis increases the risk of death in elderly patients, based on analyses from 17 placebo-controlled trials.
  • Olanzapine linked to higher incidence of stroke and transient ischemic attack, including fatal stroke.

Precipitation of Severe Opioid Withdrawal in Patients Who Are Physiologically Dependent on Opioids

  • Lybalvi is contraindicated in patients who are using opioids or undergoing acute opioid withdrawal.
  • Samidorphan can precipitate opioid withdrawal in patients who are dependent on opioids, which can lead to an opioid withdrawal syndrome, sometimes requiring hospitalization.
  • Prior to initiating treatment, there should be an opioid-free interval:
    • At least 7 days from last use of short-acting opioids.
    • At least 14 days from last use of long-acting opioids.

Vulnerability to Life-Threatening Opioid Overdose

  • Attempting to overcome Lybalvi’s opioid blockade with high or repeated doses of exogenous opioids could lead to life-threatening or fatal opioid intoxication, particularly if Lybalvi is interrupted or discontinued, subjecting the patient to high levels of unopposed opioid agonist as the samidorphan blockade wanes.
  • If a Lybalvi-treated patient needs to treated with opioids for anesthesia or analgesia, Lybalvi should be discontinued; opioids should be administered by a person trained in the use of anesthetic drugs and the management of the respiratory effects of opioids; and the patient should be continuously monitored in a setting equipped and staffed for cardiopulmonary resuscitation.
  • In non-emergency situations, if a patient treated with Lybalvi is expected to require opioid treatment, discontinue Lybalvi at least 5 days before opioid treatment and start olanzapine or another antipsychotic, if needed.
  • Opioid treatment may be less effective or ineffective shortly after Lybalvi discontinuation.
  • Patients with a history of chronic opioid use prior to treatment with Lybalvi may have decreased opioid tolerance if Lybalvi is interrupted or discontinued; this may increase the risk of opioid overdose if opioids are resumed at the previously tolerated dosage.

Neuroleptic Malignant Syndrome (NMS)

  • Antipsychotic medications have been associated with NMS, a potentially fatal symptom complex.
  • Clinical manifestations of NMS: Hyperpyrexia, muscle rigidity, delirium, autonomic instability.
  • Additional signs of NMS: Elevated creatinine phosphokinase, myoglobinuria (rhabdomyolysis), acute renal failure.
  • Discontinue Lybalvi immediately if NMS is suspected.
  • Intensive symptomatic treatment and monitoring should be provided to patients who develop NMS.

Drug Reaction with Eosinophilia and Systemic Symptoms (DRESS)

  • DRESS has been reported with olanzapine.
  • May present with cutaneous reaction, eosinophilia, fever, and/or lymphadenopathy with systemic complications (eg, hepatitis, nephritis, pneumonitis, myocarditis, pericarditis)
  • Discontinue Lybalvi if DRESS is suspected.

Metabolic Changes

  • Hyperglycemia and Diabetes Mellitus
    • Hyperglycemia has been reported with atypical antipsychotics.
    • Monitor for symptoms of hyperglycemia during treatment.
    • Patients should undergo fasting blood glucose testing at the beginning of treatment and periodically during treatment.
  • Dyslipidemia
    • Antipsychotics may cause adverse alterations in lipids.
    • Obtain fasting lipid profile at baseline and monitor periodically during treatment.
  • Weight Gain
    • Antipsychotic use has been associated with weight gain.
    • Monitor weight at baseline and frequently thereafter.

Tardive Dyskinesia

  • Patients treated with antipsychotics may develop tardive dyskinesia, a syndrome consisting of potentially irreversible, involuntary, dyskinetic movements.
  • Risk highest among elderly, especially elderly women.
  • Tardive dyskinesia may develop after a brief treatment period, even at low doses, and may also occur after discontinuation of treatment.
  • Prescribe Lybalvi in a manner that reduces the risk of tardive dyskinesia.
  • Reserve chronic antipsychotic treatment for patients who suffer from chronic illness that is known to respond to antipsychotic drugs; and for whom alternative, effective, but potentially less harmful treatments are not available or appropriate.
  • Use the lowest effective dose and the shortest duration of treatment to produce a satisfactory clinical response.
  • Reassess the need for continued treatment and if signs/symptoms of tardive dyskinesia appear, consider discontinuing treatment with Lybalvi.
  • Some patients may require continued treatment despite the presence of tardive dyskinesia.

Orthostatic Hypotension and Syncope

  • Risk for orthostatic hypotension and syncope is greatest during initial dose administration.
  • Patients vulnerable to hypotension: Orthostatic vital signs should be monitored.
  • Lybalvi has not been evaluated in patients with a recent history of myocardial infarction or unstable cardiovascular disease.

Falls

  • Lybalvi may cause somnolence, postural hypotension, and motor and sensory instability.
  • Patients with diseases, conditions or on medications that exacerbate these effects: Complete fall risk assessments when initiating treatment and periodically during long term treatment.

Leukopenia, Neutropenia, and Agranulocytosis

  • Leukopenia and neutropenia have been reported with Lybalvi.
  • Risk factors for leukopenia, neutropenia: Pre-existing low white blood cell (WBC) count or absolute neutrophil count (ANC) and history of drug-induced leukopenia or neutropenia; perform CBC in these patients frequently during the first few months of treatment.
  • Consider discontinuing Lybalvi at the first sign of a clinically significant decline in WBC in the absence of other causative factors.
  • Monitor patients with clinically significant neutropenia for fever, signs of infection; treat promptly.
  • ANC< 1000/mm3: Discontinue Lybalvi.

Dysphagia

  • Esophageal dysmotility and aspiration have been associated with antipsychotic drugs.
  • Use cautiously in patients at risk for aspiration.

Seizures

  • Lybalvi may cause seizures.
  • The risk is greatest in patients with a history of seizures or with conditions that lower the seizure threshold.

Potential for Cognitive and Motor Impairment

  • Lybalvi may impair judgement, thinking and motor skills.
  • Caution patients not to operate hazardous machinery, including motor vehicles, until they are reasonably certain that therapy does not affect them adversely.

Body Temperature Dysregulation

  • Atypical antipsychotics may disrupt the body’s ability to reduce core body temperature.
  • Use Lybalvi with caution in patients who perform strenuous exercise, are exposed to extreme heat, are dehydrated, or are on anticholinergic medications.

Anticholinergic Effects

  • Use with caution in patients with a current diagnosis or prior history of urinary retention, clinically significant prostatic hypertrophy, constipation, or a history of paralytic ileus or related conditions.
  • Risk of severe adverse reactions was increased with concomitant anticholinergic medications.

Hyperprolactinemia

  • Olanzapine may elevate prolactin levels; elevations may persist during chronic administration.
  • Galactorrhea, amenorrhea, gynecomastia, and impotence have been reported in patients receiving prolactin-elevating compounds.

Pregnancy Considerations

Neonates exposed to antipsychotic drugs during the third trimester are at risk for extrapyramidal and/or withdrawal symptoms following delivery.

Health care providers are encouraged to register patients in the National Pregnancy Registry for Atypical Antipsychotics at 866-961-2388 or online at https://womensmentalhealth.org/research/pregnancyregistry/.

Nursing Mother Considerations

Olanzapine is present in human milk. Excess sedation, irritability, poor feeding and extrapyramidal symptoms have been reported in infants exposed to olanzapine through breast milk.

There are no data on the presence of samidorphan or the combination of olanzapine and samidorphan in human milk, the effects on the breastfed infant or the effects on milk production.

Monitor for excess sedation, irritability, poor feeding, and extrapyramidal symptoms in infants exposed to Lybalvi.

Benefits of breastfeeding should be consider along with the mother’s need for Lybalvi and any potential adverse effects on the breastfed child.

Pediatric Considerations

Safety and effectiveness of Lybalvi have not been established in pediatric patients. 

Geriatric Considerations

Clinical studies of Lybalvi did not include sufficient numbers of patients 65 years of age and older to determine whether they responded differently than younger adult patients.

Consider a lower dosage of the olanzapine component in geriatric patients who may have decreased clearance or an exaggerated pharmacodynamic response to olanzapine.

Renal Impairment Considerations

No dosage adjustment is needed in patients with mild, moderate or severe renal impairment. Lybalvi is not recommended in patients with end-stage renal disease.

Hepatic Impairment Considerations

No dose adjustment is needed in patients with hepatic impairment.

Other Considerations for Specific Populations

Females of reproductive age: Olanzapine increases serum prolactin levels, which may lead to a reversible reduction in fertility. 

Lybalvi Pharmacokinetics

Absorption

Olanzapine: Tmax 4.5-7 hours

Samidorphan: Tmax 1-2 hours

Distribution

Olanzapine: 93% protein bound

Samidorphan: 23-33% protein bound

Metabolism

Olanzapine: (UGT1A4, CYP1A2) primarily, (CYP2D6) minor

Samidorphan: (CYP3A4) primarily, (CYP3A5, CYP2C19, CYP2C8) minor.

Elimination

Olanzapine: Half-life: 35-52 hours. Urine (unchanged): 7%; Urine (unchanged and metabolites): 57%; Feces (unchanged and metabolites): 30%

Samidorphan: Half-life: 7-11 hours. Urine (unchanged): 18%; Urine (unchanged and metabolites): 67%; Feces (unchanged and metabolites): 16%

Lybalvi Interactions

Interactions

See Contraindications. Concomitant strong CYP3A4 inducers, levodopa and dopamine agonists: not recommended. Concomitant strong CYP1A2 inhibitors: consider dosage reduction of olanzapine component. Concomitant CYP1A2 inducers: consider dosage increase of olanzapine component. Orthostatic hypotension with alcohol, diazepam, other CNS acting drugs, antihypertensives. Risk for severe GI adverse reactions with anticholinergic drugs; use cautiously.

Lybalvi Adverse Reactions

Adverse Reactions

Increased weight, somnolence, dry mouth, headache, asthenia, constipation, increased appetite, dizziness, tremor, dyspepsia, back pain, speech disorder, increased salivation, amnesia, paresthesia; orthostatic hypotension, syncope, agranulocytosis, hyperprolactinemia.

Lybalvi Clinical Trials

Clinical Trials

The approval of Lybalvi was based on data from 27 clinical studies, including the phase 3 ENLIGHTEN-1 (ClinicalTrials.gov Identifier: NCT02634346) and ENLIGHTEN-2 (ClinicalTrials.gov Identifier: NCT02694328) studies for the treatment of adults with schizophrenia. 

In the ENLIGHTEN-1 study (N=403), the efficacy and safety of Lybalvi was evaluated in adults with acute exacerbation of schizophrenia. Patients were randomly assigned 1:1:1 to receive Lybalvi, olanzapine, or placebo once daily for 4 weeks.

Findings showed that treatment with Lybalvi led to statistically significant reductions from baseline in Positive and Negative Syndrome Scale scores compared with placebo (primary endpoint; P<.001) in patients experiencing an acute exacerbation of schizophrenia; a similar improvement was noted in the olanzapine arm when compared with placebo (P=.004).

The inclusion of samidorphan did not appear to negatively impact the antipsychotic efficacy of olanzapine.

The ENLIGHTEN-2 (N=561) study compared the weight gain profile of Lybalvi to olanzapine in adults with schizophrenia. Patients were randomly assigned 1:1 to receive Lybalvi or olanzapine for 24 weeks.

Results showed that treatment with Lybalvi was associated with statistically significant less weight gain compared with olanzapine (P=.003), and with a smaller proportion of patients who gained 10% or more of their baseline body weight (P=.003).

The approval of Lybalvi for the treatment of bipolar I disorder was supported by the established efficacy and safety profile of orally administered olanzapine in adequate and well-controlled studies.

Lybalvi Note

Not Applicable

Lybalvi Patient Counseling

Patient Counseling

Concomitant use with opioids is contraindicated.

Report to the emergency department if signs/symptoms of neuroleptic malignant syndrome develop.

Report signs/symptoms associated with DRESS.

Tardive dyskinesia possible with antipsychotic medications; report abnormal movements.

Risk of metabolic changes, monitoring of blood glucose, lipids, and weight is necessary.

Pre-existing low WBC or a history of drug induced leukopenia/ neutropenia: CBC monitoring needed during treatment.

Risk of orthostatic hypotension and syncope, especially early in treatment, and also at times of re-initiating treatment.

Do not perform activities requiring mental alertness, such as operating hazardous machinery or operating a motor vehicle, until it has been established that Lybalvi does not not impact cognitive and motor performance adversely.

Avoid overheating and dehydration.

Report pregnancy; use of Lybalvi during the third trimester may cause extrapyramidal and/or withdrawal symptoms  in the neonate.

Breastfeeding women: Monitor infants for excess sedation, irritability, poor feeding and extrapyramidal symptoms.

Lybalvi may impair fertility.

Do not split or combine tablets.

Changes in prescription medications, OTC/herbal use should be reported because of potential drug interactions.

Use caution consuming alcohol while taking Lybalvi.

Cost Savings Program

Lybalvi Generic Name & Formulations

General Description

Olanzapine, samidorphan; 5mg/10mg, 10mg/10mg, 15mg/10mg, 20mg/10mg; tabs.

Pharmacological Class

Atypical antipsychotic + opioid antagonist.

How Supplied

Tabs—7, 30, 90

How Supplied

Tablets

  • 5mg/10mg (olanzapine/samidorphan): Yellow, capsule-shaped; marked with “OS” and “5”—7, 30, 90
  • 10mg/10mg (olanzapine/samidorphan): Orange, capsule-shaped; marked with “OS” and “10”—7, 30, 90
  • 15mg/10mg (olanzapine/samidorphan): Blue, capsule-shaped; marked with “OS” and “15”—7, 30, 9020mg/10mg (olanzapine/samidorphan): Pink, capsule-shaped; marked with “OS” and “20”—7, 30, 90

Storage

Store at room temperature 20°C to 25°C (68°F to 77°F) with excursions permitted between 15°C and 30°C (59°F and 86°F).

Store in the original bottle with desiccant. Keep bottle tightly closed and protect from moisture.

Manufacturer

Generic Availability

NO

Mechanism of Action

The mechanism of action of olanzapine is unclear; however, its efficacy in the treatment of schizophrenia or bipolar I disorder could be mediated through a combination of dopamine and serotonin type 2 (5HT2) antagonism. The mechanism of action of samidorphan could be mediated through opioid receptor antagonism.

Lybalvi Indications

Indications

Schizophrenia.

Lybalvi Dosage and Administration

Prior to Treatment Evaluations

Lybalvi is contraindicated in patients using opioids or undergoing acute opioid withdrawal. Delay initiation of Lybalvi in these patients for a minimum of 7 days after last use of short-acting opioids and 14 days after last use of long-acting opioids.

Adult

Initially 5mg/10mg or 10mg/10mg once daily. May adjust at weekly intervals of 5mg as tolerated; max: 20mg/10mg once daily. Patients with higher risk of hypotensive reactions, risk of slower olanzapine metabolism, or more sensitive to olanzapine: initially 5mg/10mg.

Children

Not established.

Administration

May take with or without food.

Do not divide tablets or combine strengths.

Lybalvi Contraindications

Contraindications

Current opioid use. Acute opioid withdrawal. If coadministered with lithium or valproate; refer to respective prescribing information.

Lybalvi Boxed Warnings

Boxed Warning

Increased mortality in elderly patients with dementia-related psychosis.

Lybalvi Warnings/Precautions

Warnings/Precautions

Elderly with dementia-related psychosis (not approved use); increased risk of death or cerebrovascular events (eg, stroke, TIA). Precipitation of severe opioid withdrawal in patients dependent on opioids; delay initiation for a minimum of 7 days after last use of short-acting opioids; or 14 days after last use of long-acting opioids. Risk of opioid overdose from attempts to overcome samidorphan blockade. Risk of resuming opioids in those with prior opioid use. Discontinue if neuroleptic malignant syndrome or if DRESS is suspected. Consider discontinuation if tardive dyskinesia occurs. Diabetes. Monitor for hyperglycemia, hyperlipidemia; do fasting blood glucose and lipids testing at beginning, and during therapy. Monitor for weight gain. Cardio- or cerebrovascular disease. Hypotension. Dehydration. Hypovolemia. Pre-existing low WBCs or history of leukopenia/neutropenia; monitor CBCs during 1st few months of treatment; discontinue if WBCs decline or severe neutropenia (ANC <1000/mm3) occurs. Perform fall risk assessments when initiating and recurrently on long-term therapy. Dysphagia. History of seizures. Conditions that lower the seizure threshold. Strenuous exercise. Exposure to extreme heat. Urinary retention. Significant prostatic hypertrophy. Constipation. History of paralytic ileus or related conditions. Breast cancer. Reevaluate periodically. Severe hepatic impairment. ESRD: not recommended. Neonates: risk of extrapyramidal and/or withdrawal symptoms post delivery (due to exposure during 3rd-trimester pregnancy). Pregnancy. Nursing mothers: monitor infants.

Warnings/Precautions

Increased Mortality, Cerebrovascular Adverse Reactions (Including Stroke) in Elderly Patients with Dementia-Related Psychosis

  • Lybalvi is not approved for the treatment of dementia-related psychosis
  • Antipsychotic use for dementia-related psychosis increases the risk of death in elderly patients, based on analyses from 17 placebo-controlled trials.
  • Olanzapine linked to higher incidence of stroke and transient ischemic attack, including fatal stroke.

Precipitation of Severe Opioid Withdrawal in Patients Who Are Physiologically Dependent on Opioids

  • Lybalvi is contraindicated in patients who are using opioids or undergoing acute opioid withdrawal.
  • Samidorphan can precipitate opioid withdrawal in patients who are dependent on opioids, which can lead to an opioid withdrawal syndrome, sometimes requiring hospitalization.
  • Prior to initiating treatment, there should be an opioid-free interval:
    • At least 7 days from last use of short-acting opioids.
    • At least 14 days from last use of long-acting opioids.

Vulnerability to Life-Threatening Opioid Overdose

  • Attempting to overcome Lybalvi’s opioid blockade with high or repeated doses of exogenous opioids could lead to life-threatening or fatal opioid intoxication, particularly if Lybalvi is interrupted or discontinued, subjecting the patient to high levels of unopposed opioid agonist as the samidorphan blockade wanes.
  • If a Lybalvi-treated patient needs to treated with opioids for anesthesia or analgesia, Lybalvi should be discontinued; opioids should be administered by a person trained in the use of anesthetic drugs and the management of the respiratory effects of opioids; and the patient should be continuously monitored in a setting equipped and staffed for cardiopulmonary resuscitation.
  • In non-emergency situations, if a patient treated with Lybalvi is expected to require opioid treatment, discontinue Lybalvi at least 5 days before opioid treatment and start olanzapine or another antipsychotic, if needed.
  • Opioid treatment may be less effective or ineffective shortly after Lybalvi discontinuation.
  • Patients with a history of chronic opioid use prior to treatment with Lybalvi may have decreased opioid tolerance if Lybalvi is interrupted or discontinued; this may increase the risk of opioid overdose if opioids are resumed at the previously tolerated dosage.

Neuroleptic Malignant Syndrome (NMS)

  • Antipsychotic medications have been associated with NMS, a potentially fatal symptom complex.
  • Clinical manifestations of NMS: Hyperpyrexia, muscle rigidity, delirium, autonomic instability.
  • Additional signs of NMS: Elevated creatinine phosphokinase, myoglobinuria (rhabdomyolysis), acute renal failure.
  • Discontinue Lybalvi immediately if NMS is suspected.
  • Intensive symptomatic treatment and monitoring should be provided to patients who develop NMS.

Drug Reaction with Eosinophilia and Systemic Symptoms (DRESS)

  • DRESS has been reported with olanzapine.
  • May present with cutaneous reaction, eosinophilia, fever, and/or lymphadenopathy with systemic complications (eg, hepatitis, nephritis, pneumonitis, myocarditis, pericarditis)
  • Discontinue Lybalvi if DRESS is suspected.

Metabolic Changes

  • Hyperglycemia and Diabetes Mellitus
    • Hyperglycemia has been reported with atypical antipsychotics.
    • Monitor for symptoms of hyperglycemia during treatment.
    • Patients should undergo fasting blood glucose testing at the beginning of treatment and periodically during treatment.
  • Dyslipidemia
    • Antipsychotics may cause adverse alterations in lipids.
    • Obtain fasting lipid profile at baseline and monitor periodically during treatment.
  • Weight Gain
    • Antipsychotic use has been associated with weight gain.
    • Monitor weight at baseline and frequently thereafter.

Tardive Dyskinesia

  • Patients treated with antipsychotics may develop tardive dyskinesia, a syndrome consisting of potentially irreversible, involuntary, dyskinetic movements.
  • Risk highest among elderly, especially elderly women.
  • Tardive dyskinesia may develop after a brief treatment period, even at low doses, and may also occur after discontinuation of treatment.
  • Prescribe Lybalvi in a manner that reduces the risk of tardive dyskinesia.
  • Reserve chronic antipsychotic treatment for patients who suffer from chronic illness that is known to respond to antipsychotic drugs; and for whom alternative, effective, but potentially less harmful treatments are not available or appropriate.
  • Use the lowest effective dose and the shortest duration of treatment to produce a satisfactory clinical response.
  • Reassess the need for continued treatment and if signs/symptoms of tardive dyskinesia appear, consider discontinuing treatment with Lybalvi.
  • Some patients may require continued treatment despite the presence of tardive dyskinesia.

Orthostatic Hypotension and Syncope

  • Risk for orthostatic hypotension and syncope is greatest during initial dose administration.
  • Patients vulnerable to hypotension: Orthostatic vital signs should be monitored.
  • Lybalvi has not been evaluated in patients with a recent history of myocardial infarction or unstable cardiovascular disease.

Falls

  • Lybalvi may cause somnolence, postural hypotension, and motor and sensory instability.
  • Patients with diseases, conditions or on medications that exacerbate these effects: Complete fall risk assessments when initiating treatment and periodically during long term treatment.

Leukopenia, Neutropenia, and Agranulocytosis

  • Leukopenia and neutropenia have been reported with Lybalvi.
  • Risk factors for leukopenia, neutropenia: Pre-existing low white blood cell (WBC) count or absolute neutrophil count (ANC) and history of drug-induced leukopenia or neutropenia; perform CBC in these patients frequently during the first few months of treatment.
  • Consider discontinuing Lybalvi at the first sign of a clinically significant decline in WBC in the absence of other causative factors.
  • Monitor patients with clinically significant neutropenia for fever, signs of infection; treat promptly.
  • ANC< 1000/mm3: Discontinue Lybalvi.

Dysphagia

  • Esophageal dysmotility and aspiration have been associated with antipsychotic drugs.
  • Use cautiously in patients at risk for aspiration.

Seizures

  • Lybalvi may cause seizures.
  • The risk is greatest in patients with a history of seizures or with conditions that lower the seizure threshold.

Potential for Cognitive and Motor Impairment

  • Lybalvi may impair judgement, thinking and motor skills.
  • Caution patients not to operate hazardous machinery, including motor vehicles, until they are reasonably certain that therapy does not affect them adversely.

Body Temperature Dysregulation

  • Atypical antipsychotics may disrupt the body’s ability to reduce core body temperature.
  • Use Lybalvi with caution in patients who perform strenuous exercise, are exposed to extreme heat, are dehydrated, or are on anticholinergic medications.

Anticholinergic Effects

  • Use with caution in patients with a current diagnosis or prior history of urinary retention, clinically significant prostatic hypertrophy, constipation, or a history of paralytic ileus or related conditions.
  • Risk of severe adverse reactions was increased with concomitant anticholinergic medications.

Hyperprolactinemia

  • Olanzapine may elevate prolactin levels; elevations may persist during chronic administration.
  • Galactorrhea, amenorrhea, gynecomastia, and impotence have been reported in patients receiving prolactin-elevating compounds.

Pregnancy Considerations

Neonates exposed to antipsychotic drugs during the third trimester are at risk for extrapyramidal and/or withdrawal symptoms following delivery.

Health care providers are encouraged to register patients in the National Pregnancy Registry for Atypical Antipsychotics at 866-961-2388 or online at https://womensmentalhealth.org/research/pregnancyregistry/.

Nursing Mother Considerations

Olanzapine is present in human milk. Excess sedation, irritability, poor feeding and extrapyramidal symptoms have been reported in infants exposed to olanzapine through breast milk.

There are no data on the presence of samidorphan or the combination of olanzapine and samidorphan in human milk, the effects on the breastfed infant or the effects on milk production.

Monitor for excess sedation, irritability, poor feeding, and extrapyramidal symptoms in infants exposed to Lybalvi.

Benefits of breastfeeding should be consider along with the mother’s need for Lybalvi and any potential adverse effects on the breastfed child.

Pediatric Considerations

Safety and effectiveness of Lybalvi have not been established in pediatric patients. 

Geriatric Considerations

Clinical studies of Lybalvi did not include sufficient numbers of patients 65 years of age and older to determine whether they responded differently than younger adult patients.

Consider a lower dosage of the olanzapine component in geriatric patients who may have decreased clearance or an exaggerated pharmacodynamic response to olanzapine.

Renal Impairment Considerations

No dosage adjustment is needed in patients with mild, moderate or severe renal impairment. Lybalvi is not recommended in patients with end-stage renal disease.

Hepatic Impairment Considerations

No dose adjustment is needed in patients with hepatic impairment.

Other Considerations for Specific Populations

Females of reproductive age: Olanzapine increases serum prolactin levels, which may lead to a reversible reduction in fertility. 

Lybalvi Pharmacokinetics

Absorption

Olanzapine: Tmax 4.5-7 hours

Samidorphan: Tmax 1-2 hours

Distribution

Olanzapine: 93% protein bound

Samidorphan: 23-33% protein bound

Metabolism

Olanzapine: (UGT1A4, CYP1A2) primarily, (CYP2D6) minor

Samidorphan: (CYP3A4) primarily, (CYP3A5, CYP2C19, CYP2C8) minor.

Elimination

Olanzapine: Half-life: 35-52 hours. Urine (unchanged): 7%; Urine (unchanged and metabolites): 57%; Feces (unchanged and metabolites): 30%

Samidorphan: Half-life: 7-11 hours. Urine (unchanged): 18%; Urine (unchanged and metabolites): 67%; Feces (unchanged and metabolites): 16%

Lybalvi Interactions

Interactions

See Contraindications. Concomitant strong CYP3A4 inducers, levodopa and dopamine agonists: not recommended. Concomitant strong CYP1A2 inhibitors: consider dosage reduction of olanzapine component. Concomitant CYP1A2 inducers: consider dosage increase of olanzapine component. Orthostatic hypotension with alcohol, diazepam, other CNS acting drugs, antihypertensives. Risk for severe GI adverse reactions with anticholinergic drugs; use cautiously.

Lybalvi Adverse Reactions

Adverse Reactions

Increased weight, somnolence, dry mouth, headache, asthenia, constipation, increased appetite, dizziness, tremor, dyspepsia, back pain, speech disorder, increased salivation, amnesia, paresthesia; orthostatic hypotension, syncope, agranulocytosis, hyperprolactinemia.

Lybalvi Clinical Trials

Clinical Trials

The approval of Lybalvi was based on data from 27 clinical studies, including the phase 3 ENLIGHTEN-1 (ClinicalTrials.gov Identifier: NCT02634346) and ENLIGHTEN-2 (ClinicalTrials.gov Identifier: NCT02694328) studies for the treatment of adults with schizophrenia. 

In the ENLIGHTEN-1 study (N=403), the efficacy and safety of Lybalvi was evaluated in adults with acute exacerbation of schizophrenia. Patients were randomly assigned 1:1:1 to receive Lybalvi, olanzapine, or placebo once daily for 4 weeks.

Findings showed that treatment with Lybalvi led to statistically significant reductions from baseline in Positive and Negative Syndrome Scale scores compared with placebo (primary endpoint; P<.001) in patients experiencing an acute exacerbation of schizophrenia; a similar improvement was noted in the olanzapine arm when compared with placebo (P=.004).

The inclusion of samidorphan did not appear to negatively impact the antipsychotic efficacy of olanzapine.

The ENLIGHTEN-2 (N=561) study compared the weight gain profile of Lybalvi to olanzapine in adults with schizophrenia. Patients were randomly assigned 1:1 to receive Lybalvi or olanzapine for 24 weeks.

Results showed that treatment with Lybalvi was associated with statistically significant less weight gain compared with olanzapine (P=.003), and with a smaller proportion of patients who gained 10% or more of their baseline body weight (P=.003).

The approval of Lybalvi for the treatment of bipolar I disorder was supported by the established efficacy and safety profile of orally administered olanzapine in adequate and well-controlled studies.

Lybalvi Note

Not Applicable

Lybalvi Patient Counseling

Patient Counseling

Concomitant use with opioids is contraindicated.

Report to the emergency department if signs/symptoms of neuroleptic malignant syndrome develop.

Report signs/symptoms associated with DRESS.

Tardive dyskinesia possible with antipsychotic medications; report abnormal movements.

Risk of metabolic changes, monitoring of blood glucose, lipids, and weight is necessary.

Pre-existing low WBC or a history of drug induced leukopenia/ neutropenia: CBC monitoring needed during treatment.

Risk of orthostatic hypotension and syncope, especially early in treatment, and also at times of re-initiating treatment.

Do not perform activities requiring mental alertness, such as operating hazardous machinery or operating a motor vehicle, until it has been established that Lybalvi does not not impact cognitive and motor performance adversely.

Avoid overheating and dehydration.

Report pregnancy; use of Lybalvi during the third trimester may cause extrapyramidal and/or withdrawal symptoms  in the neonate.

Breastfeeding women: Monitor infants for excess sedation, irritability, poor feeding and extrapyramidal symptoms.

Lybalvi may impair fertility.

Do not split or combine tablets.

Changes in prescription medications, OTC/herbal use should be reported because of potential drug interactions.

Use caution consuming alcohol while taking Lybalvi.

Cost Savings Program