Zyprexa
Olanzapine tablets in six strengths from 2.5mg to 20mg, used in the management of schizophrenia and bipolar disorder. A 5-HT2 and D2 antagonist.
- Category
- Mental Health
- Active ingredient
- Olanzapine
- Route
- Oral use
- Form
- Tablet
- Strengths
- 2.5 · 5 · 7.5 · 10 · 15 · 20mg
You will receive a quality generic equivalent, depending on stock.
No prescription needed: we place your order for Zyprexa on your behalf.
- Conditions
- Schizophrenia · Bipolar Disorder
- Therapeutic class
- Second-Generation Antipsychotic
- Pharmacological class
- Thienobenzodiazepine
- Contraindications
- narrow-angle glaucoma; hypersensitivity to olanzapine
- Precautions and warnings
- monitor blood sugar levels; watch for weight gain; avoid sudden discontinuation
- Minor side effects
- somnolence; weight gain; dizziness
- Moderate side effects
- orthostatic hypotension; elevated prolactin levels; dry mouth
- Dosage forms
- Tablet
- Administration route
- Oral use
- Originator
- Eli Lilly
- Onset Time
- 1–2 weeks
- Duration
- Daily
- Storage instructions
- Store at room temperature in original container.
- Drug interactions
- diazepam; alcohol; levodopa
- Age restrictions
- Not recommended for children under 13.
Serious side effects
neuroleptic malignant syndrome, requires immediate medical attention; hyperglycaemia, requires immediate medical attention; tardive dyskinesia, requires immediate medical attention
Patient summary
Olanzapine tablets in six strengths from 2.5mg to 20mg, used in the management of schizophrenia and bipolar disorder. A 5-HT2 and D2 antagonist.
Mechanism of action
Olanzapine acts as an antagonist at both serotonin (5HT2A/2C) and dopamine (D2) receptors. It also exerts effects on muscarinic, histaminic, and adrenergic receptors to stabilize chemical signalling in the brain.
Pregnancy and breastfeeding
Pregnancy: Use only if benefit outweighs risk. Breastfeeding: Use with caution; consult a doctor.
Zyprexa is the brand-name formulation of olanzapine, an antipsychotic treatment used to manage symptoms of schizophrenia and bipolar disorder. The medication is supplied as a tablet in strengths ranging from 2.5mg to 20mg. It is an established option for patients requiring consistent therapeutic support for these conditions.
Buying Zyprexa online
While the original brand is widely recognised, generic olanzapine, often produced in India, offers a more affordable pathway for long-term health management. For expats and people living far from a well-stocked pharmacy, reliable sourcing ensures consistent access to therapy. This medication is best used under the guidance of a doctor.
Do I get the original Zyprexa?
No. SGMeds ships a generic with the same active ingredient (olanzapine) at the strength you choose, not the original Zyprexa made by Eli Lilly. We use the brand name so you can find the medicine, and the generic's manufacturer varies with stock.
What is Zyprexa for?
Zyprexa is used for schizophrenia and bipolar disorder.
How much does Zyprexa cost in Singapore?
Zyprexa comes in 2.5, 5, 7.5, 10, 15 and 20mg strengths, in packs of 10 to 360 tablets. Each option's price is shown on this page in Singapore dollars, converted from US dollars, so the exchange rate can change the final amount. Larger packs work out cheaper per tablet.
Payment and prices →What side effects does Zyprexa have?
The most common side effects of olanzapine are drowsiness (somnolence), weight gain and dizziness. Less common ones are dizziness on standing (orthostatic hypotension), elevated prolactin levels and dry mouth. Serious side effects include a rare reaction with high fever and stiff muscles (neuroleptic malignant syndrome), high blood sugar (hyperglycaemia) and lasting involuntary movements (tardive dyskinesia). Get medical help straight away if you notice one of these serious effects.
Can I drink alcohol with Zyprexa?
Alcohol can interact with olanzapine, so ask a doctor or pharmacist whether you can drink while you take Zyprexa.
What does Zyprexa interact with?
Olanzapine can interact with diazepam and levodopa. Before you start Zyprexa, tell your doctor or pharmacist about any medicines, supplements or herbal remedies you take.
How fast does Zyprexa work?
Zyprexa usually starts to work within 1 to 2 weeks. This varies from person to person.
Can I order Zyprexa without a prescription?
Yes. SGMeds does not ask for a prescription to order Zyprexa: we place the order with our pharmacy partner, which prepares it and arranges delivery on your behalf.
Ordering without a prescription →Do you deliver Zyprexa to Singapore?
Yes. Parcels go to Singapore and Malaysia by Express shipping (tracked, up to 1 week) or Regular shipping (up to 3 weeks).
How ordering works →What you will receive
Zyprexa is the originator brand name, made by Eli Lilly. We use it here to identify the medicine only; we are not affiliated with Eli Lilly and do not ship the original Zyprexa.
- You receive a generic equivalent: the same active ingredient (Olanzapine) at the same dose, mostly recognised Indian branded generics from vetted manufacturers.
- The exact brand supplied depends on what is in stock at the dispatching warehouse.
- A regulated generic matches the original ingredient for ingredient by legal standard.