Olanzapine Trade Name
No, Seroquel is NOT the trade name for olanzapine—Seroquel is the brand name for quetiapine, a completely different atypical antipsychotic medication. 1
Correct Trade Names
Olanzapine's trade name is Zyprexa (manufactured by Eli Lilly). 2, 3 The long-acting injectable formulation is marketed as:
- Zyprexa Relprevv (in the United States)
- Zypadhera (in other markets) 2
Key Distinctions Between These Medications
Olanzapine (Zyprexa)
- Chemical class: Thienobenzodiszepine 3
- Primary uses: Schizophrenia, bipolar disorder, and increasingly used off-label for chemotherapy-induced nausea/vomiting 4
- Mechanism: Broad-spectrum receptor antagonist targeting dopamine (D1-4), serotonin (5-HT2A, 5-HT2C, 5-HT3, 5-HT6), adrenergic, histaminergic, and muscarinic receptors 5
Quetiapine (Seroquel)
- Chemical class: Dibenzothiazepine derivative 1, 6
- Active ingredient: Quetiapine fumarate 1
- Primary uses: Schizophrenia, bipolar disorder, major depressive disorder (adjunctive)
- Mechanism: Higher affinity for serotonin (5-HT2A) receptors relative to dopamine (D2) receptors 6
Common Clinical Pitfall
These medications are frequently confused in practice, particularly when prescribed at lower doses for off-label indications such as insomnia or anxiety. 7, 8 Both medications:
- Belong to the atypical antipsychotic class
- Share similar side effect profiles (sedation, weight gain, metabolic effects)
- Are sometimes used interchangeably in clinical discussions
However, they are pharmacologically distinct agents with different receptor binding profiles and should not be considered equivalent or interchangeable.