Clozaril (Clozapine)
Complete patient guide for uses, dosage, side effects, and safety information
Quick Facts
What Is Clozaril Used For?
Clozaril contains clozapine, an antipsychotic medication that helps manage symptoms of schizophrenia, a mental disorder characterized by disturbances in thought, emotion, and behavior.
Primary Uses
Clozaril is primarily used to treat schizophrenia, particularly in patients who have not responded to other antipsychotic medications or have experienced severe side effects from them.
How It Works
Clozaril works by correcting chemical imbalances in the brain that may contribute to mental illness.
Good to know: Clozaril is not considered addictive.
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How to Take Clozaril
Follow your doctor's instructions carefully when taking Clozaril to ensure its effectiveness and safety.
Dosage Instructions
The typical starting dose is half of a 25 mg tablet once or twice on the first day, increasing to one 25 mg tablet once or twice on the second day. The dose may be gradually increased to achieve the desired effect, usually ranging from 200 mg to 450 mg daily.
What If You Miss a Dose?
If you miss a dose and it's almost time for your next dose (within 4 hours), skip the missed dose. If it's been longer, take it as soon as you remember but do not double the dose.
Important: Never take a double dose to make up for a missed dose, as this may increase the risk of side effects.
Available Tablet Strengths
Side Effects
Like all medications, this medicine can cause side effects. Most are mild and temporary, but some require medical attention.
Common Side Effects
These side effects occur relatively frequently and usually don’t require emergency care:
- constipation
- abdominal pain
- nausea
- vomiting
- stomach discomfort
- diarrhea
- dry mouth
Seek immediate medical attention if you experience:
- fever
- sore throat
- mouth ulcers
- flu-like symptoms
- fast or irregular heartbeat
- severe constipation
- myocarditis
Impulse Control Issues
Clozaril may lead to impulse control problems, such as gambling or spending issues.
Important Warnings
Clozaril has several important warnings to consider before use.
Who Should Not Take Clozaril
Do not take Clozaril if you are allergic to clozapine or any of its ingredients, have a low white blood cell count, are unable to have regular blood tests, or have certain medical conditions such as severe liver or kidney disease, myocarditis, uncontrolled epilepsy, or severe constipation.
Medical Conditions to Discuss
Inform your doctor if you have a history of heart disease, liver or kidney issues, glaucoma, diabetes, or if you are prone to seizures.
Pregnancy and Breastfeeding
Consult your doctor if you are pregnant or planning to become pregnant. Clozaril is not recommended during breastfeeding as it may affect the baby.
Elderly Patients With Dementia: Clozaril may pose additional risks for elderly patients with dementia.
Drug Interactions
Clozaril may interact with various medications, affecting how well it works.
Grapefruit interaction: Grapefruit may affect how Clozaril works.
- other antipsychotic medications
- medications for depression or mood swings
- benzodiazepines
- anticonvulsants like phenytoin and carbamazepine
- warfarin
- strong pain relievers like morphine
- St John's wort
- antihistamines
- medications for Parkinson's disease
- blood pressure medications
- digoxin
- certain antibiotics
- medications for fungal or viral infections
Alcohol & Driving
Be cautious with alcohol consumption and operating machinery while taking Clozaril.
Alcohol
Avoid drinking alcohol while on Clozaril as it may increase drowsiness.
Driving and Operating Machinery
Be careful when driving or using machinery until you know how Clozaril affects you.
Temperature Regulation
Clozaril may affect your body's ability to regulate temperature, especially during vigorous exercise or in hot environments.
Storage
Store Clozaril tablets in a cool, dry place below 30°C and keep them out of reach of children.
Overdose Information
If you suspect an overdose of Clozaril, seek immediate medical attention. Symptoms may include lightheadedness, excessive saliva, difficulty breathing, fast heartbeat, drowsiness, confusion, and unconsciousness.
Frequently Asked Questions
Clozaril may take some time to show its full effects, and your doctor will monitor your progress.
You can take Clozaril with or without food, but it's best to take it at the same time each day.
No, Clozaril is not considered addictive.
Do not stop taking Clozaril suddenly without consulting your doctor, as it may worsen your condition.
It is advised to avoid alcohol while taking Clozaril due to increased drowsiness.
Clozaril may cause weight gain and alterations in blood lipid levels, so your doctor may monitor these.
Elderly patients, especially those with dementia, should use Clozaril with caution due to increased risks.
If you miss a dose, skip it if it's close to your next dose time. Otherwise, take it as soon as you remember but do not double the dose.
Important Disclaimer
This information is intended for general educational purposes only and should not be considered medical advice. Always consult your healthcare provider or pharmacist before starting, stopping, or changing any medication.
If you think you may have a medical emergency, call your doctor or emergency services immediately.