Zyprexa vs. Invega

See how Zyprexa and Invega compare on approved uses, dosing, side effects, and cost.

Key Takeaways

  • Both Zyprexa and Invega are atypical antipsychotics for schizophrenia, but Zyprexa also treats bipolar mania and depression while Invega covers schizoaffective disorder.

  • Zyprexa requires dose titration and comes in tablet, dissolving tablet, and injectable forms, while Invega is a fixed-dose extended-release tablet taken once daily.

  • Zyprexa carries a higher risk of sedation and weight gain, while Invega carries more risk of insomnia and movement-related side effects like restlessness.

Zyprexa vs. Invega Drug Summary

Zyprexa

Zyprexa (olanzapine) is an atypical antipsychotic approved to treat schizophrenia and bipolar I disorder, including acute mania and long-term maintenance. It is also used for acute agitation and, combined with fluoxetine, for bipolar or treatment-resistant depression. It comes as a tablet, a dissolving tablet, or an injection, usually taken once daily.

Invega

Invega (paliperidone) is an atypical antipsychotic approved to treat schizophrenia and schizoaffective disorder in adults and teens. It is taken as a once-daily extended-release tablet that releases medication steadily through the day using a non-absorbable outer shell. Longer-acting injectable versions are also available for people who prefer less frequent dosing.

Zyprexa vs. Invega Side Effects

Zyprexa

Most common
somnolence (up to 52%)
akathisia (up to 27%)
dizziness (up to 18%)
weight gain (1-10%)

Invega

Most common
insomnia (up to 15%)
extrapyramidal symptoms (up to 13%)
akathisia (up to 12%)
sedation/somnolence (up to 7%)

Zyprexa vs. Invega Dosage

Zyprexa

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 5-10 mg once daily At the start
Maximum dose 2.5-10 mg per IM dose If needed
Dose changes 4 increases As tolerated

Invega

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 3 mg once daily At the start
Maximum dose 12 mg once daily If needed
Dose changes 3 increases As tolerated

Zyprexa vs. Invega Indications

Zyprexa

Zyprexa treats schizophrenia in adults and teens as well as bipolar I disorder, covering acute manic episodes and long-term maintenance. It is also approved for rapid control of severe agitation and, when combined with fluoxetine, for depressive episodes tied to bipolar disorder or treatment-resistant depression. Some clinicians use it off-label to prevent nausea during chemotherapy.

  • Schizophrenia in adults and adolescents (13-17)

  • Bipolar I mania, alone or with lithium/valproate

  • Maintenance treatment of bipolar I disorder

Invega

Invega treats schizophrenia in adults and teens ages 12 to 17, as well as schizoaffective disorder in adults. It can be used alone or added to mood stabilizers or antidepressants for schizoaffective disorder. Unlike Zyprexa, it does not carry FDA approval for bipolar disorder or depression.

  • Schizophrenia in adults and adolescents (12-17)

  • Schizoaffective disorder, used alone

  • Schizoaffective disorder, added to mood stabilizers or antidepressants

Zyprexa vs. Invega Pros and Cons

Zyprexa

Zyprexa has one of the broadest FDA-approval profiles among antipsychotics, covering schizophrenia, bipolar mania, and depression combinations. It comes in more formulations than Invega, including a fast-dissolving tablet and a short-acting injection for acute situations. Its long track record since 1996 gives clinicians decades of experience with its risks and benefits.

Pros

  • FDA-approved for bipolar mania, maintenance, and depression, not just schizophrenia

  • Available as an orally dissolving tablet for people who struggle to swallow pills

  • Short-acting IM injection option for treating acute agitation quickly

  • More predictable monthly cost, roughly $440 to $900 without insurance

Cons

  • Higher risk of significant weight gain and metabolic changes than paliperidone

  • Long-acting injectable form (Relprevv) requires a restricted REMS monitoring program

  • Somnolence is very common, reported in more than half of patients in trials

Invega

Invega offers simple, fixed daily dosing without the titration Zyprexa requires, and its extended-release design keeps drug levels steady throughout the day. It is approved for a narrower set of conditions than Zyprexa, focused on schizophrenia and schizoaffective disorder. Longer-acting injectable options make it appealing for people who struggle with daily pills.

Pros

  • Simple once-daily fixed doses with no titration schedule needed

  • Extended-release shell gives steady drug levels across the day

  • Long-acting injectable options dosed monthly, every 3 months, or every 6 months

  • Lower reported rates of sedation and weight gain than olanzapine

Cons

  • Not approved for bipolar disorder or depression, only schizophrenia-spectrum conditions

  • Requires dose adjustments based on kidney function

  • Higher risk of QT prolongation, requiring caution with other heart-affecting drugs

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