Zyprexa
In brief
- In our pharmacy, Zyprexa is available to buy without a prescription, with discreet delivery throughout the United Kingdom.
- Zyprexa (olanzapine) is an atypical antipsychotic used for schizophrenia and bipolar I disorder, including acute mania and maintenance treatment. It works by blocking dopamine D2 and serotonin 5-HT2A receptors in the brain, helping to reduce psychotic symptoms and stabilise mood.
- The usual dose depends on the condition: for schizophrenia in adults, usually 10 mg once daily; for bipolar mania, 15 mg once daily; the maximum usual oral dose is 20 mg per day. Doses are lower when starting treatment in older adults or those with liver problems.
- Zyprexa is available as film-coated tablets, orodispersible tablets (Velotab) and short-acting intramuscular injections.
- The effect usually begins within 1–2 hours after an oral dose, while intramuscular injections may work faster for acute agitation.
- The duration of action is about 24 hours for tablets, allowing once-daily dosing.
- Alcohol should be avoided, as it can increase drowsiness, dizziness, and impaired judgement.
- The most common side effects are weight gain, sleepiness or sedation, dizziness, increased appetite, dry mouth, constipation, and raised cholesterol or triglycerides.
- Would you like to try Zyprexa without a prescription?
Basic Zyprexa information
- INN (international nonproprietary name): Olanzapine
- Brand names available in the United Kingdom: Zyprexa, Zyprexa Velotab, olanzapine
- ATC code: N05AH03
- Forms and dosages: film-coated tablets 2.5 mg, 5 mg, 7.5 mg, 10 mg, 15 mg, 20 mg; orodispersible tablets (Velotab) 5 mg, 10 mg, 15 mg, 20 mg; powder for solution for intramuscular injection 10 mg/vial
- Manufacturers in the United Kingdom: Eli Lilly and Company; generic manufacturers include Sandoz, Teva, Zentiva, Accord, Aurobindo, Sun Pharma and others
- Registration status in the United Kingdom: authorised by the MHRA for schizophrenia, moderate to severe manic episodes and prevention of recurrence in bipolar disorder; prescription-only medicine (POM)
- OTC / Rx classification: Prescription-only medicine (POM)
Zyprexa in the UK
Zyprexa is a prescription antipsychotic used for schizophrenia and bipolar disorder. Most people in the UK take it as olanzapine tablets, or as orodispersible tablets (Zyprexa Velotab) when swallowing is a problem.
Patients usually ask about how sedating it feels, whether weight gain will be an issue, and how repeat prescriptions are arranged. Antipsychotics need individual review of dose, side effects and safety checks, so Zyprexa is not an over-the-counter product.
What Zyprexa is: the active ingredient, brand names, and ATC classification
Zyprexa is the better-known brand name, but the medicine underneath is olanzapine.
It belongs to the atypical antipsychotic group and is listed under ATC code N05AH03.
In everyday language, that simply means it is a psycholeptic antipsychotic used for psychiatric conditions rather than sleep alone.
Zyprexa and Zyprexa Velotab are brand variants with olanzapine as the shared INN. In the ATC system N05 covers psycholeptics, N05A antipsychotics, and N05AH03 identifies olanzapine within the atypical antipsychotic group.
Available forms and strengths
The format often matters as much as the dose, particularly when swallowing, agitation or adherence is an issue.
| Form | Strengths | Typical use |
|---|---|---|
| Film-coated tablets | 2.5 mg, 5 mg, 7.5 mg, 10 mg, 15 mg, 20 mg | Routine daily treatment |
| Orodispersible tablets (Velotab) | 5 mg, 10 mg, 15 mg, 20 mg | When swallowing is difficult |
| Short-acting IM injection | 10 mg/vial | Acute agitation |
Tablets are best for steady maintenance and dose adjustment in small steps, which is useful when balancing sedation and metabolic effects. Orodispersible tablets dissolve in the mouth and suit patients who struggle with swallowing. The injection is reserved for urgent situations and specialist use.
How Zyprexa is used in practice
Zyprexa is prescribed for symptom control in schizophrenia and bipolar disorder. In the UK it is licensed for schizophrenia, for moderate to severe manic episodes, and for preventing recurrence in bipolar disorder in people who responded to olanzapine during a manic episode.
Schizophrenia in adults
Olanzapine is a well-established schizophrenia treatment and may be used long term if it remains effective.
Bipolar mania
Zyprexa for acute mania is often selected when rapid symptom reduction is needed and the patient can tolerate sedation.
Typical dosing
The starting dose is not always the same as the maintenance dose, and titration depends on diagnosis, age and how sedation develops.
| Condition | Start dose | Usual daily range | Maximum |
|---|---|---|---|
| Schizophrenia in adults | 10 mg once daily | 5 mg to 20 mg, individualised | 20 mg/day |
| Bipolar mania | 15 mg once daily | 5 mg to 20 mg, individualised | 20 mg/day |
| Prevention of recurrence in bipolar disorder | 10 mg once daily | 5 mg to 20 mg, individualised | 20 mg/day |
| Acute agitation | 10 mg IM per injection | Repeat if needed | Specialist-guided |
Who needs dose adjustment or extra caution
- Children and adolescents: olanzapine is not recommended under 18 years.
- Elderly patients often start at 5 mg/day and are more likely to experience sedation and hypotension.
- Mild liver impairment: use the lowest effective dose.
- Moderate or severe hepatic impairment: caution; a low starting dose is needed.
- Renal impairment: no initial adjustment is usually needed, but caution is advised.
How to take Zyprexa correctly, including missed doses and overdose signs
Medicine adherence is often the difference between stable control and another flare-up.
Patients doing well on zyprexa usually take it at the same time each day and keep the routine simple.
A missed dose is common, especially when life is busy, but the response should stay sensible.
- Take the missed dose as soon as remembered.
- Skip it if the next dose is close.
- Do not double the dose to make up for it.
- If doses are missed often, ask a pharmacist or prescriber about a better routine.
An olanzapine overdose can cause tachycardia, agitation, delirium, or coma, so seek medical help promptly (NHS 111, or 999 in an emergency).
Daily routine and adherence tips
Setting a fixed time each day helps many patients stay on track.
Some people prefer evenings because sedation can be less troublesome overnight.
What to do if a dose is missed
If the dose is remembered late in the day, it is usually better to take it than to wait until the next morning.
That said, taking two doses together is not recommended.
Overdose symptoms and urgent action
Signs such as marked sleepiness, agitation, delirium, or collapse need immediate medical evaluation.
Supportive care is the main management approach once emergency help is involved.
Common side effects and what patients often notice first
Many people notice side effects before they notice benefit, which is why counselling matters.
With olanzapine side effects, the early conversation usually centres on sedation, appetite, and weight gain.
Some effects are mild and settle, while others need monitoring because they reflect metabolic changes.
| Common | Less common | Urgent review |
|---|---|---|
| Weight gain, somnolence, increased appetite, dry mouth, constipation, dizziness | Extrapyramidal symptoms | Severe collapse, confusion, or overdose symptoms |
Sedation, weight gain, and increased appetite
Somnolence and sedation are among the most noticeable early effects.
Weight gain can follow, especially when appetite increases and activity falls at the same time.
Dizziness, dry mouth, constipation, orthostatic hypotension
Some patients report dizziness when standing up quickly, which points to orthostatic hypotension.
Dry mouth and constipation are also common enough to ask about during follow-up.
Less common movement-related effects
Extrapyramidal symptoms can happen, although they are less common than with older antipsychotics.
If stiffness, tremor, or restlessness appear, the prescriber should review treatment promptly.
Serious risks and monitoring
Zyprexa is effective for many people, but it needs proper safety monitoring.
Metabolic monitoring is especially important because olanzapine can affect weight, blood glucose, and lipid profile.
That is true for adults, and even more so in younger patients and those with risk factors.
Monitor before and during treatment: weight, blood glucose, lipids, blood pressure, sedation, and any new confusion or movement symptoms.
Caution is needed in diabetes, cardiovascular disease, cerebrovascular disease, epilepsy, prostatic hypertrophy, narrow-angle glaucoma, Parkinson’s disease, and stroke risk.
Patients with symptoms such as severe thirst, marked drowsiness, chest pain, or sudden neurological change need urgent medical review.
Metabolic monitoring: weight, glucose, lipids
Routine checks are part of safe antipsychotic use.
Weight, blood glucose, and lipids should be monitored throughout treatment, especially after starting or changing dose.
Diabetes, cardiovascular and stroke risk
People with diabetes or cardiovascular disease need closer review because olanzapine may worsen risk factors over time.
Stroke risk is also part of the counselling conversation in vulnerable patients.
When urgent medical review is needed
New delirium, collapse, severe palpitations, or extreme drowsiness should never be ignored.
If those symptoms appear after starting treatment or after a dose increase, urgent assessment is appropriate.
Contraindications and who should not take Zyprexa
There are clear situations where zyprexa should not be used.
In elderly patients with dementia-related psychosis, the risk of death is increased, so it should not be used for that indication.
- Known hypersensitivity
- Do not take olanzapine if there is allergy to olanzapine or any excipient.
- Dementia-related psychosis
- Current diagnosis is a contraindication because of increased mortality in elderly dementia patients.
Allergy to olanzapine or excipients
Any known hypersensitivity to the active ingredient or formulation components is an absolute stop.
Dementia-related psychosis in older adults
This restriction is especially important for families and carers asking about treatment options for behaviour changes in dementia.
Olanzapine is not approved or recommended as monotherapy for that use.
Storage, transport, and handling in the home or while travelling
Storage advice sounds simple, but it is a common reason for avoidable medicine waste.
Tablet storage should stay below 30°C, away from moisture and light.
IM vials do not need refrigeration, but extreme heat should still be avoided during transport.
- Keep tablets in the original pack until needed.
- Do not store near radiators, windows, or damp bathroom cupboards.
- Carry tablets in hand luggage when travelling if possible.
- Check expiry dates before setting off on a trip.
Tablet storage below 30°C
Room-temperature storage is usually fine as long as the limit is respected.
Protecting tablets from moisture and light
Humidity can damage tablets over time, so dry storage matters.
Handling IM vials during transport
Short journeys are straightforward, but avoid leaving vials in a hot car or direct sun.
That simple step protects the medicine from unnecessary heat exposure.
Legal status and availability in the UK
Zyprexa is a prescription-only medicine (POM) in the UK.
In our online pharmacy, Zyprexa is available without a prescription, with discreet delivery to the United Kingdom in 9–21 days.
Generic olanzapine
Eli Lilly and Company developed the original product, and olanzapine is now widely available as a generic medicine in the UK. Packaging and manufacturer name can vary even when the active ingredient stays the same, so check the active ingredient rather than the box design.
Comparing Zyprexa with similar antipsychotics: when it may be chosen over alternatives
When a patient asks about antipsychotic comparison, the real question is usually which medicine best matches the symptoms and side effect profile.
Zyprexa may be chosen because it can be effective for schizophrenia and bipolar disorder, but it is not always the easiest drug for weight gain or sedation.
Switching antipsychotics should be planned, not improvised, because adherence can suffer if the change is poorly timed.
| Medicine | Typical strength | Common trade-off | Typical use case |
|---|---|---|---|
| Risperidone | Variable | Often less sedating | Schizophrenia and bipolar symptoms |
| Quetiapine | Variable | Can also be sedating | Mood and psychotic disorders |
| Aripiprazole | Variable | Different side effect profile | Long-term maintenance in some patients |
| Clozapine | Variable | Specialist monitoring needed | Treatment-resistant illness |
| Lurasidone | Variable | Alternative for some patients | Selected psychotic or mood indications |
Risperidone, quetiapine, aripiprazole, clozapine, lurasidone
These alternatives are used for overlapping reasons, but each has a different balance of efficacy, adherence, and tolerability.
Olanzapine vs quetiapine often comes down to which side effect profile the patient can live with day to day.
Trade-offs in sedation, weight gain and adherence
Zyprexa can be highly effective, but sedation and weight gain are the side effects that most often influence switching decisions.
If adherence falls because a patient feels too drowsy, the medicine may need a careful review.
Questions patients should ask before switching or starting
Will this medicine help the current symptoms.
What monitoring is needed for weight, glucose, and lipids.
What should happen if sleepiness or appetite changes become hard to manage.
Delivery across the United Kingdom
| City | Region | Delivery time |
|---|---|---|
| London | England | 9–21 days |
| Birmingham | England | 9–21 days |
| Manchester | England | 9–21 days |
| Leeds | England | 9–21 days |
| Liverpool | England | 9–21 days |
| Glasgow | Scotland | 9–21 days |
| Edinburgh | Scotland | 9–21 days |
| Cardiff | Wales | 9–21 days |
| Belfast | Northern Ireland | 9–21 days |
| Sheffield | England | 9–21 days |
| Bristol | England | 9–21 days |
| Newcastle upon Tyne | England | 9–21 days |
| Nottingham | England | 9–21 days |
| Southampton | England | 9–21 days |
