Compare Clozaril vs. Zyprexa

Head-to-head comparisons of medication uses, side effects, ratings, and more.

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Clozaril (clozapine)

Prescription only

Zyprexa (olanzapine)

Prescription only
Helps control your thoughts and actions.

Clozaril (clozapine) treats schizophrenia when other drugs haven't worked, but you'll have to get regular blood work done because it can have very serious side effects.

Helps control your thoughts and mood.

Zyprexa (olanzapine) is good for treating psychosis, mania, and agitation, but it's more likely to cause weight gain and sleepiness than other antipsychotics.

3.7/ 5 average rating with 68 reviewsforZyprexa
Upsides
  • Studies show that Clozaril (clozapine) effectively treats schizophrenia when other medications have failed. Clozaril (clozapine) also reduces risk of suicidal behavior.
  • Has the lowest risk of causing movement problems when compared to other antipsychotic medicines.
  • Clozaril (clozapine) is available as a normal tablet and as a mint-flavored tablet that dissolves on the tongue without water.
  • Safer than other similar medicines during pregnancy.
  • Available as a generic, which is cheaper.
  • Effective at relieving psychotic symptoms, manic episodes, and agitation in people with schizophrenia and bipolar disorder.
  • Less likely to cause heart problems than other antipsychotics.
  • Less likely to cause movement problems compared to older antipsychotics.
Downsides
  • You need to get blood work done every time you get a prescription filled for Clozaril (clozapine). Once it is ready at the pharmacy, you need to pick it up within 7 days.
  • You can only get Clozaril (clozapine) at certain pharmacies that are registered to provide it.
  • You need to limit the amount of alcohol you drink while taking Clozaril (clozapine).
  • Clozaril (clozapine) can cause high blood sugar, high cholesterol, and weight gain.
  • May not be optimal for someone with a history of seizures.
  • More likely to cause weight gain and increase cholesterol or blood sugar compared to other antipsychotics.
  • Might make you more sleepy than some antipsychotics.
  • Mild risk of Extrapyramidal Symptoms (EPS): Movement disorders that include stiffness, tremor, restlessness, and slow, repetitive movements you can't control.
  • You may need routine blood tests to check how the medicine is affecting your body..
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Used for
  • Schizophrenia
  • Suicidal behavior in schizophrenia
  • Psychosis in Parkinson's disease
Dosage forms
  • Pill
  • Dissolving tablet
  • Liquid
  • Pill
  • Dissolving tablet
  • Injection
Price
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Reviews
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68 reviews so far
41%
saidit'sworth it
51%
saiditworked well
51%
saidit'sa big hassle

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Side effects
31possible side effects
  • Drowsiness/sedation
    39%
  • Salivation
    31%
  • Fast heartbeat
    25%
  • Dizziness/vertigo
    19%
  • Constipation
    14%
  • Low blood pressure
    9%
  • Headache
    7%
  • Tremor
    6%
  • Fainting
    6%
  • Sweating
    6%
  • Dry mouth
    6%
  • Nausea
    5%
  • Vision problems
    5%
  • Fever
    5%
  • Disturbed sleep/nightmares
    4%
  • Restlessness
    4%
  • Loss of muscle movement
    4%
  • Agitation
    4%
  • High blood pressure
    4%
  • Stomach discomfort/heartburn
    4%
  • Weight gain
    4%
  • Seizures (convulsions)
    3%
  • Rigidity
    3%
  • Confusion
    3%
  • Nausea/vomiting
    3%
  • Low white blood cells
    3%
  • Fatigue
    2%
  • Trouble sleeping
    2%
  • Diarrhea
    2%
  • Problems urinating
    2%
  • Rash
    2%
See more detailed side effects
9possible side effects
  • Drowsiness
    48%
  • Weight gain
    28%
  • Increased appetite
    28%
  • Headache
    17%
  • Fatigue
    14%
  • Dizziness
    7%
  • Dry Mouth
    7%
  • Abdominal pain
    6%
  • Pain in extremity
    5%
See more detailed side effects
Risks and risk factors
  • Low white blood cells
  • Low blood pressure, slow heartbeat, and fainting
    • Dehydration
    • Taking blood pressure medications
    • Heart failure
  • Seizures
    • Seizure disorder
    • Alcohol abuse
  • Heart problems
    • History of heart problems
  • Increased risk of death in elderly with dementia
    • Over 65 with dementia
  • High blood sugar, high cholesterol, and weight gain
See more detailed risks and warnings
  • Increased risk of death
    • Elderly patients with dementia
  • Blood disorders
  • Neuroleptic malignant syndrome
  • Heart problems
    • History of heart problems
    • Drug interactions
  • Shaking and restlessness
  • Higher blood sugar, high cholesterol, and weight gain
    • People with diabetes
    • People with high cholesterol
See more detailed risks and warnings