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This medication is used to treat certain mental/mood disorders (such as schizophrenia). Iloperidone helps you to think more clearly, feel less nervous, and take part in everyday life. It may also help to decrease hallucinations (hearing/seeing things that are not there). Iloperidone is a psychiatric medication that belongs to the class of drugs called atypical antipsychotics. It works by helping to restore the balance of certain natural substances in the brain.

If you miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose and resume your usual dosing schedule. Do not double the dose to catch up.

Take this medication by mouth with or without food as directed by your doctor, usually 2 times a day. Dosage is based on your medical condition, other drugs you are taking, and your response to treatment. To reduce your risk of side effects from low blood pressure (such as dizziness, fainting, fast heartbeat), your doctor will start you on a low dose and gradually increase your dose until you are taking the best dose for you. It may take 1 to 2 weeks before you are taking your full dose. Follow your doctor's directions carefully. Take this medication regularly to get the most benefit from it. To help you remember, take it at the same times each day. If you miss or stop taking this medication for more than 3 days, do not restart taking this medication at the same dose without calling your doctor first. Your doctor may direct you to restart at a low dose and gradually increase the dose. Continue taking this medication exactly as prescribed, even if you are feeling better and thinking more clearly. Do not increase your dose or take this drug more often than prescribed. Your symptoms will not improve any faster, and your risk of side effects will increase. Do not stop taking this medication without consulting your doctor. Tell your doctor if your condition does not improve or if it worsens. It may take several weeks before you feel the full benefit of this medication.

The effects of some drugs can change if you take other drugs or herbal products at the same time. This can increase your risk for serious side effects or may cause your medications not to work correctly. These drug interactions are possible, but do not always occur. Your doctor or pharmacist can often prevent or manage interactions by changing how you use your medications or by close monitoring. To help your doctor and pharmacist give you the best care, be sure to tell your doctor and pharmacist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products) before starting treatment with this product. While using this product, do not start, stop, or change the dosage of any other medicines you are using without your doctor's approval. Some products that may interact with this drug include: alpha blockers (such as prazosin), anticholinergic/antispasmodic drugs (such as atropine, dicyclomine, scopolamine). Other medications can affect the removal of iloperidone from your body, which may affect how iloperidone works. Examples include azole antifungals (such as ketoconazole, itraconazole), HIV drugs (such as ritonavir), macrolide antibiotics (such as clarithromycin), antidepressants (such as fluoxetine, paroxetine, nefazodone), among others. Many drugs besides iloperidone may affect the heart rhythm (QT prolongation), including amiodarone, dofetilide, pimozide, procainamide, quinidine, sotalol, macrolide antibiotics (such as erythromycin), among others. Therefore, before using iloperidone, report all medications you are currently using to your doctor or pharmacist. Tell your doctor or pharmacist if you are taking other products that cause dizziness or drowsiness, including alcohol, antihistamines (such as cetirizine, diphenhydramine), drugs for sleep or anxiety (such as alprazolam, diazepam, zolpidem), muscle relaxants, and narcotic pain relievers (such as codeine). Check the labels on all your medicines (such as allergy or cough-and-cold products) because they may contain ingredients that cause dizziness or drowsiness. Ask your pharmacist about using those products safely. This document does not contain all possible drug interactions. Keep a list of all the products you use. Share this list with your doctor and pharmacist to lessen your risk for serious medication problems.

Do not share this medication with others. Laboratory and/or medical tests (such as EKG, blood sugar level, potassium/magnesium blood levels, blood pressure) should be performed periodically to monitor your progress or check for side effects. Consult your doctor for more details.

If overdose is suspected, contact a poison control center or emergency room immediately. US residents can call the US National Poison Hotline at 1-800-222-1222. Canada residents can call a provincial poison control center.

See also Warning section. Before taking iloperidone, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details. Before using this medication, tell your doctor or pharmacist your medical history, especially of: liver problems, heart problems (such as past heart attack, chest pain, abnormal heartbeat), stroke, diabetes, low blood pressure, seizures, low white blood cell count, loss of too much body water (dehydration), breast cancer, dementia (such as Alzheimer's Disease), trouble swallowing. Iloperidone may cause a condition that affects the heart rhythm (QT prolongation). QT prolongation can infrequently result in serious (rarely fatal) fast/irregular heartbeat and other symptoms (such as severe dizziness, fainting) that require immediate medical attention. The risk of QT prolongation may be increased if you have certain medical conditions or are taking other drugs that may affect the heart rhythm (see also Drug Interactions section). Before using iloperidone, tell your doctor or pharmacist if you have any of the following conditions: certain heart problems (heart failure, slow heartbeat, QT prolongation in the EKG), family history of certain heart problems (QT prolongation in the EKG, sudden cardiac death). Low levels of potassium or magnesium in the blood may also increase your risk of QT prolongation. This risk may increase if you use certain drugs (such as diuretics/"water pills") or if you have conditions such as severe sweating, diarrhea, or vomiting. Talk to your doctor about using iloperidone safely. This drug may make you dizzy or drowsy. Do not drive, use machinery, or do any activity that requires alertness until you are sure you can perform such activities safely. Avoid alcoholic beverages. Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products). This medication may decrease your ability to sweat, making you more likely to get heat stroke. Avoid activities that may cause you to overheat (such as doing strenuous work/exercise in hot weather, using hot tubs). When the weather is hot, drink plenty of fluids and dress lightly. If you become overheated, promptly seek cooler shelter and stop exercising. Seek immediate medical attention if you develop a fever, mental/mood changes, headache, or dizziness. During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor. It is unknown if this medication passes into breast milk. Consult your doctor before breast-feeding.

Store at room temperature at 77 degrees F (25 degrees C) away from light and moisture. Brief storage between 59-86 degrees F (15-30 degrees C) is permitted. Do not store in the bathroom. Keep all medications away from children and pets. Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company for more details about how to safely discard your product.

See also How to Use section. Drowsiness, dizziness, dry mouth, tiredness, stuffy nose, and weight gain may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly. This medication may cause a serious drop in blood pressure, especially when starting or increasing the dose. To reduce the risk of dizziness and lightheadedness, get up slowly when rising from a sitting or lying position. Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. Tell your doctor immediately if any of these rare but serious side effects occur: drooling/trouble swallowing, signs of infection (such as persistent cough, fever), shaking (tremor), muscle stiffness/spasms. Infrequently, this medication may cause face/muscle twitching and uncontrollable movements (tardive dyskinesia). In some cases, this condition may be permanent. Tell your doctor immediately if you develop any uncontrollable movements such as lip smacking, mouth puckering, tongue thrusting, chewing, or unusual arm/leg movements. This drug may rarely make your blood sugar level rise, which can cause or worsen diabetes. Weight gain from this drug may increase the risk of this side effect. Tell your doctor immediately if you develop symptoms of high blood sugar such as increased thirst and urination. If you already have diabetes, be sure to check your blood sugar level regularly. In rare cases, iloperidone may increase your level of a certain substance made by the body (prolactin). For females, this increase in prolactin may result in unwanted breast milk, missed/stopped periods, or difficulty becoming pregnant. For males, it may result in decreased sexual ability, inability to produce sperm, or enlarged breasts. If you develop any of these symptoms, tell your doctor immediately. Rarely, males may have a painful or prolonged erection lasting 4 or more hours. If this occurs, stop using this drug and seek immediate medical attention, or permanent problems could occur. This drug may rarely cause a serious (sometimes fatal) nervous system problem (neuroleptic malignant syndrome-NMS). Seek immediate medical attention if you notice any of the following side effects: unexplained fever, stiff muscles, increased sweating, fast/irregular heartbeat, sudden mental/mood changes (such as confusion, loss of consciousness). Seek immediate medical attention if any of these rare but very serious side effects occur: fainting, fast/slow/irregular heartbeat, seizures, severe dizziness, signs of stroke (such as weakness on one side of the body, slurred speech, sudden vision changes, confusion), signs of heart failure (such as swelling ankles/feet, trouble breathing, unusual tiredness). A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing. This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist. In the US - Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088. In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

This section contains uses of this drug that are not listed in the approved professional labeling for the drug but that may be prescribed by your health care professional. Use this drug for a condition that is listed in this section only if it has been so prescribed by your health care professional. This medication may also be used in combination with other medication to treat depression.

There may be a slightly increased risk of serious, possibly fatal side effects (such as stroke, heart failure, pneumonia) when this medication is used in older adults with dementia. This medication is not approved for the treatment of dementia-related behavior problems. Discuss the risks and benefits of this medication, as well as other effective and possibly safer treatments for dementia-related behavior problems, with the doctor. If you are using iloperidone in combination with other medication to treat depression, also carefully read the drug information for the other medication.