Clozapine Generic Name:
Clozapine (KLOE-za-peen)Brand Name:
Clozapine may cause serious blood disorders, heart problems, low blood pressure (with or without fainting), breathing problems, and seizures. Blood tests will be required before and during treatment with Clozapine . You will not be able to have your medicine filled without these blood tests. Discuss these blood tests with your doctor.
The risk of seizures may be greater with higher doses or if you have a history of seizures. Do not perform activities in which a sudden loss of consciousness could cause harm to yourself or others (eg, driving, swimming).
The risk of heart or breathing problems may be greater if you are taking benzodiazepines (eg, lorazepam) or other medicines for mental or mood problems. Tell your doctor about any other medicines that you take.
Clozapine may increase the risk of death when used to treat mental problems caused by dementia in elderly patients. Most of the deaths were linked to heart problems or infection. Clozapine is not approved to treat mental problems caused by dementia.
Clozapine is used for:
Managing schizophrenia in patients who do not respond to other medicines. It is used to decrease the risk of suicidal behavior in certain patients. It may also be used for other conditions as determined by your doctor.
Clozapine is an atypical antipsychotic. It may work by affecting certain chemicals in the brain. This has an effect on thinking and behavior.
Do NOT use Clozapine if:
- you are allergic to any ingredient in Clozapine
- you have bone marrow problems, other blood cell problems, or a history of blood problems caused by Clozapine
- you have uncontrolled seizures (eg, epilepsy) or loss of bowel muscle movement (paralytic ileus)
- you have severe drowsiness
- you are taking other medicines that may cause blood problems. Ask your doctor if you are unsure if any of your medicines may cause blood problems
Contact your doctor or health care provider right away if any of these apply to you.
Before using Clozapine :
Some medical conditions may interact with Clozapine . Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:
- if you are pregnant, planning to become pregnant, or are breast-feeding
- if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
- if you have allergies to medicines, foods, or other substances
- if you have a history of blood clots, blood problems, high blood cholesterol levels, heart problems, or lung or breathing problems
- if you have a history of an enlarged prostate; prolonged, painful erections; liver or kidney problems; seizures (eg, epilepsy); glaucoma; stomach or bowel problems; or dementia
- if you have poor health, diabetes, or a family member with diabetes, or you are very overweight
- if you have decreased activity of enzymes that metabolize certain medicines
Some MEDICINES MAY INTERACT with Clozapine . Tell your health care provider if you are taking any other medicines, especially any of the following:
- Benzodiazepines (eg, lorazepam) or other medicines for mental or mood problems because the risk of heart or breathing problems may be increased
- Cimetidine, erythromycin, quinolone antibiotics (eg, ciprofloxacin), risperidone, or selective serotonin reuptake inhibitors (SSRIs) (eg, fluoxetine) because they may increase the risk of Clozapine 's side effects
- Barbiturates (eg, phenobarbital), hydantoins (eg, phenytoin), nicotine, or rifampin because they may decrease Clozapine 's effectiveness
- Antiarrhythmics (eg, propafenone, quinidine), anticholinergics (eg, benztropine), carbamazepine, debrisoquin, dextromethorphan, medicines for depression or high blood pressure, phenothiazines (eg, chlorpromazine), or tricyclic antidepressants (eg, amitriptyline) because the risk of their side effects may be increased by Clozapine
This may not be a complete list of all interactions that may occur. Ask your health care provider if Clozapine may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.
How to use Clozapine :
Use Clozapine as directed by your doctor. Check the label on the medicine for exact dosing instructions.
- Clozapine may be taken with or without food. If stomach upset occurs, take with food to reduce stomach irritation.
- Continue to take Clozapine even if you feel well. Do not miss any doses.
- Taking Clozapine at the same time each day will help you to remember to take it.
- Do not suddenly stop taking Clozapine without first checking with your doctor.
- If you miss a dose of Clozapine , take it as soon as possible. If it is almost time for your next dose, skip the missed dose. Go back to your regular dosing schedule. Do not take 2 doses at once.
- If you miss taking a dose of Clozapine for more than 2 days do not start taking it again. Contact your doctor right away for instructions.
Ask your health care provider any questions you may have about how to use Clozapine .
Important safety information:
- Clozapine may cause drowsiness, dizziness, or lightheadedness. These effects may be worse if you take it with alcohol or certain medicines. Use Clozapine with caution. Do not drive or perform other possibly unsafe tasks until you know how you react to it.
- Do not use alcohol or medicines that may cause drowsiness (eg, sleep aids, muscle relaxers) while you taking Clozapine . It may increase their effects. Ask your pharmacist if you have questions about which medicines may cause drowsiness.
- Clozapine may cause dizziness, lightheadedness, or fainting; alcohol, hot weather, exercise, or fever may increase these effects. To prevent them, sit up or stand slowly, especially in the morning. Sit or lie down at the first sign of any of these effects.
- Clozapine may lower the ability of your body to fight infection. Avoid contact with people who have colds or infections. Tell your doctor right away if you notice any signs of infection like fever, sore throat, rash, chills, mouth or nose sores, or unusual tiredness or weakness.
- Women and patients of Jewish background may be at greater risk of developing blood problems with Clozapine .
- If you have a history of seizures, you may suddenly lose consciousness while you are taking Clozapine . Avoid activities in which loss of consciousness could be dangerous to you or others (eg, driving, swimming, climbing, operating machinery).
- Clozapine may raise your blood sugar. High blood sugar may make you feel confused, drowsy, or thirsty. It can also make you flush, breathe faster, or have a fruit-like breath odor. If these symptoms occur, tell your doctor right away.
- Avoid food and drink high in caffeine, like coffee, tea, cocoa, cola, and chocolate.
- Tell your doctor or dentist that you take Clozapine . It could have an effect on the medical or dental care, emergency care, or surgery you may receive.
- Neuroleptic malignant syndrome (NMS) is a possibly fatal syndrome that can be caused by Clozapine . Symptoms may include fever, stiff muscles, confusion, abnormal thinking, fast or irregular heartbeat, and sweating. Contact your doctor at once if you have any of these symptoms.
- Some patients who take Clozapine may develop muscle movements that they cannot control. This is more likely to happen in elderly patients, especially women. The chance that this will happen or that it will become permanent is greater in those who take Clozapine in high doses or for a long time. Muscle problems may also occur after short-term treatment with low doses. Tell your doctor at once if you have muscle problems with your tongue, face, mouth, jaw (eg, tongue sticking out, puffing of cheeks, mouth puckering, chewing movements), arms, or legs while taking Clozapine .
- Lab tests, including complete blood cell counts and heart function tests, may be performed to monitor your progress or check for side effects. Be sure to keep all doctor and lab appointments.
- Use Clozapine with caution in the ELDERLY; they may be more sensitive to its effects, especially blood problems, dizziness (especially upon standing), fast heartbeat, urinary problems, and constipation.
- Clozapine should be used with extreme caution in CHILDREN; safety and effectiveness in children have not been determined.
- PREGNANCY AND BREAST-FEEDING: If you become pregnant, contact your doctor. You will need to discuss the benefits and risks of using Clozapine while you are pregnant. It is not known if Clozapine is found in breast milk. Do not breast-feed while taking Clozapine .
Possible side effects of Clozapine :
All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome:
Constipation; dizziness; drowsiness; dry mouth; headache; heartburn; increased sweating or saliva production; lightheadedness when you stand up; nausea; strange dreams; trouble sleeping; weight gain.Seek medical attention right away if any of these SEVERE side effects occur:
Severe allergic reactions (rash; hives; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); agitation; calf pain or tenderness; chest pain; confusion; dark urine; decreased coordination; fainting; fast or irregular heartbeat; fever, chills, or sore throat; increased hunger, thirst, or urination; infection; involuntary movements of the tongue, face, mouth, or jaw (eg, tongue sticking out, puffing of cheeks, mouth puckering, chewing movements); loss of appetite; numbness of an arm or leg; rapid breathing; restlessness; seizures; severe headache, dizziness, or vomiting; severe or persistent nausea or constipation; severe stomach pain; shortness of breath; stiff muscles; sudden, unusual weight gain; swelling of the hands, ankles, or feet; tremor; trouble swallowing; uncontrolled muscle movements; unusual mental or mood changes; unusual tiredness or weakness; vision changes; vomiting; yellowing of the skin or eyes.
This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your health care provider. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088. You may also report side effects at http://www.fda.gov/medwatch.
If OVERDOSE is suspected:
Contact 1-800-222-1222 (the American Association of Poison Control Centers), your local poison control center (http://www.aapcc.org), or emergency room immediately. Symptoms may include coma; delirium; difficult or slow breathing; dizziness; drowsiness; excessive salivation; fainting; fast or irregular heartbeat; seizures; severe or persistent dizziness or drowsiness.Proper storage of Clozapine :
Store Clozapine at room temperature, between 59 and 86 degrees F (15 and 30 degrees C). Store away from heat, moisture, and light. Do not store in the bathroom. Keep Clozapine out of the reach of children and away from pets.
- If you have any questions about Clozapine , please talk with your doctor, pharmacist, or other health care provider.
- Clozapine is to be used only by the patient for whom it is prescribed. Do not share it with other people.
- If your symptoms do not improve or if they become worse, check with your doctor.
This information is a summary only. It does not contain all information about Clozapine . If you have questions about the medicine you are taking or would like more information, check with your doctor, pharmacist, or other health care provider.
- Clozapine Prescribing Information (FDA)
- Clozapine Professional Patient Advice (Wolters Kluwer)
- Clozapine Detailed Consumer Information (PDR)
- clozapine Advanced Consumer (Micromedex) - Includes Dosage Information
- Clozaril Prescribing Information (FDA)
- Clozaril Consumer Overview
- FazaClo Prescribing Information (FDA)
- Fazaclo Consumer Overview