Pimozide Medication: Uses, Dosage, Side Effects & Interactions

Summary of Key Points

Pimozide is a prescription medication primarily used to treat specific mental and neurological conditions, such as Tourette syndrome and disorders involving tics or delusions. It works by affecting certain chemicals in the brain to help reduce symptoms like involuntary movements or abnormal thoughts. Pimozide should only be taken under the supervision of a healthcare provider, and patients must consult their doctor before making any changes to their dosage.

Names of Medication

US Brand Name: Orap

Generic Name: Pimozide

The generic name refers to the active ingredient, while the brand name is assigned by the manufacturer. In this case, Pimozide is the generic name.

Pharmacologic Category

Antipsychotic (Typical)

Dopamine Receptor Antagonist

Pimozide Dosage Guidelines

Pimozide is prescribed for various conditions, with dosing tailored to the specific condition being treated. Always follow your doctor’s instructions and consult them before adjusting your dose. If you need to speak with a healthcare provider, you can schedule a telemedicine appointment with one of our doctors.

Pimozide for Tourette Syndrome

Initial Dose: 1 to 2 mg per day, taken once daily.

Maintenance Dose: The dose may be increased by 0.5 mg every other day, depending on response and tolerance.

Maximum Dose: 10 mg per day.

Pimozide for Schizophrenia

Initial Dose: 2 mg per day, taken in divided doses.

Maintenance Dose: The dose may be increased by 1 to 2 mg weekly, depending on response.

Maximum Dose: 10 mg per day.

Pimozide for Persistent Vocal Tic Disorder

Initial Dose: 1 mg per day, taken once daily.

Maintenance Dose: The dose may be increased by 0.5 mg every other day, based on response and tolerance.

Maximum Dose: 10 mg per day.

Pimozide for Obsessive-Compulsive Disorder (OCD)

Initial Dose: 2 mg per day, taken in divided doses.

Maintenance Dose: The dose may be increased by 1 mg weekly, depending on response.

Maximum Dose: 10 mg per day.

Pimozide for Attention-Deficit Hyperactivity Disorder (ADHD)

Initial Dose: 1 mg per day, taken once daily.

Maintenance Dose: The dose may be increased by 0.5 mg every other day, based on response and tolerance.

Maximum Dose: 10 mg per day.

Pimozide for Severe Behavioral Problems

Initial Dose: 2 mg per day, taken in divided doses.

Maintenance Dose: The dose may be increased by 1 mg weekly, depending on response.

Maximum Dose: 10 mg per day.

Pimozide for Autism Spectrum Disorder

Initial Dose: 1 mg per day, taken once daily.

Maintenance Dose: The dose may be increased by 0.5 mg every other day, based on response and tolerance.

Maximum Dose: 10 mg per day.

Pimozide for Psychotic Disorders

Initial Dose: 2 mg per day, taken in divided doses.

Maintenance Dose: The dose may be increased by 1 to 2 mg weekly, depending on response.

Maximum Dose: 10 mg per day.

Pimozide for Delusional Disorder

Initial Dose: 2 mg per day, taken in divided doses.

Maintenance Dose: The dose may be increased by 1 to 2 mg weekly, depending on response.

Maximum Dose: 10 mg per day.

Pimozide for Bipolar Disorder

Initial Dose: 2 mg per day, taken in divided doses.

Maintenance Dose: The dose may be increased by 1 to 2 mg weekly, depending on response.

Maximum Dose: 10 mg per day.

Dosage Forms and Strengths

Tablet: 1 mg

Tablet: 2 mg

Tablet: 4 mg

Administration Instructions for Pimozide

Take Pimozide exactly as prescribed by your doctor. It is typically taken once daily, but your doctor may adjust the dose based on your condition and how you respond to the treatment. Swallow the tablet with a full glass of water, and avoid crushing or chewing it. If you miss a dose, take it as soon as you remember, unless it’s close to your next scheduled dose. In that case, skip the missed dose and continue with your regular dosing schedule. Do not take two doses at once to make up for a missed dose.

Pimozide Side Effects and Adverse Reactions

Like all medications, Pimozide can cause side effects. Some are more common, while others are rare but may be serious. If you experience any side effects, contact your doctor immediately. You can also schedule a telemedicine visit with one of our providers to discuss your symptoms.

Common Side Effects: Dry mouth, drowsiness, dizziness, blurred vision, and constipation. These effects are usually mild and may lessen as your body adjusts to the medication.

Serious Side Effects: Irregular heartbeat, muscle stiffness, tremors, and difficulty breathing. These symptoms require immediate medical attention.

Rare Side Effects: Seizures, severe allergic reactions (such as rash, itching, or swelling), and signs of infection (fever, persistent sore throat).

Contraindications for Pimozide

A contraindication is a condition where a medication should not be used because it could cause harm. Several contraindications exist for Pimozide:

Heart problems: Pimozide can affect the heart’s electrical activity, increasing the risk of serious arrhythmias. It is contraindicated in patients with a history of heart conditions such as arrhythmias, prolonged QT interval, or congenital long QT syndrome.

Severe liver disease: The liver is responsible for processing medications, and if it’s not functioning properly, Pimozide can build up in the body, leading to toxicity.

Low potassium or magnesium levels: Electrolyte imbalances can increase the risk of heart rhythm problems when taking Pimozide.

Use of certain medications: Pimozide is contraindicated with drugs that affect heart rhythm or inhibit the enzyme CYP3A4, which helps break down Pimozide (see Drug to Drug Interactions section below).

Known hypersensitivity: If you have had an allergic reaction to Pimozide or any of its ingredients, you should not take this medication.

Drug to Drug Interactions

Understanding potential Pimozide interactions is essential when taking this medication. Certain drugs can increase the risk of side effects or reduce the effectiveness of Pimozide. Always inform your healthcare provider about all the medications you’re using, including over-the-counter drugs and supplements. Some known Pimozide drug interactions include:

1. Antibiotics: Clarithromycin (Biaxin), Erythromycin (Erythrocin)
2. Antifungals: Ketoconazole (Nizoral), Itraconazole (Sporanox)
3. HIV medications: Ritonavir (Norvir), Saquinavir (Invirase)
4. Antidepressants: Fluoxetine (Prozac), Paroxetine (Paxil)
5. Other antipsychotics: Haloperidol (Haldol), Quetiapine (Seroquel)
6. Antiarrhythmics: Amiodarone (Cordarone), Quinidine (Quinidex)

These medications can increase the risk of serious side effects, including heart rhythm disturbances. If you’re taking any of these drugs, your healthcare provider may need to adjust your treatment plan. If you’re unsure whether your medications interact with Pimozide, consider scheduling a telemedicine visit with one of our providers for personalized guidance.

Pimozide in Pregnancy

Is it Safe to Take Pimozide When Pregnant?

Pimozide is classified as a Category C medication for pregnancy by the FDA. This means that while animal studies have shown some risk to the fetus, there are no well-controlled studies in humans. The potential benefits of taking Pimozide during pregnancy may outweigh the risks in certain cases, but it should only be used if absolutely necessary. If you’re pregnant or planning to become pregnant, it’s important to discuss the risks and benefits of taking Pimozide with your healthcare provider. You can also schedule a telemedicine appointment with one of our providers to explore safer alternatives.

Pimozide While Breastfeeding

Is it Safe to Take Pimozide While Breastfeeding?

Pimozide is not recommended while breastfeeding, as it’s unclear whether the drug passes into breast milk or what effect it may have on a nursing infant. If you’re breastfeeding or planning to breastfeed, talk to your healthcare provider about the potential risks and whether an alternative treatment might be safer for you and your baby.

Estimated Cost of Pimozide Medication

The cost of a 30-day supply of Pimozide (1 mg tablets) without insurance can vary depending on the pharmacy. With a GoodRx coupon, the estimated cost ranges from $50 to $100. Prices may fluctuate, so it’s a good idea to check with your local pharmacy or use a discount service like GoodRx to find the best price.

Possible Alternatives to Pimozide

If Pimozide isn’t suitable for you or you’re exploring alternative treatments, other options are available depending on your condition. Always discuss any changes to your treatment plan with your healthcare provider. You can also schedule a telemedicine consultation with one of our providers to explore these alternatives.

1. Tourette syndrome: Alternatives include medications like Aripiprazole (Abilify) or Clonidine (Catapres). Behavioral therapy, such as Comprehensive Behavioral Intervention for Tics (CBIT), can also be beneficial.
2. Schizophrenia: Other antipsychotics such as Risperidone (Risperdal) or Olanzapine (Zyprexa) may be considered. Psychotherapy and lifestyle changes, like stress management, can complement medication.
3. Persistent vocal tic disorder: Clonidine (Catapres) or Guanfacine (Intuniv) are potential alternatives. Behavioral therapy is also an option.
4. Obsessive-compulsive disorder (OCD): Selective serotonin reuptake inhibitors (SSRIs) like Fluoxetine (Prozac) or Sertraline (Zoloft) are commonly used. Cognitive-behavioral therapy (CBT) is often recommended.
5. Attention-deficit hyperactivity disorder (ADHD): Stimulant medications like Methylphenidate (Ritalin) or Amphetamine (Adderall) are common alternatives. Behavioral therapy and lifestyle changes, such as regular exercise, can also help manage symptoms.
6. Severe behavioral problems: Depending on the cause, medications like Risperidone (Risperdal) or behavioral interventions may be recommended.
7. Autism spectrum disorder: Behavioral therapy, speech therapy, and occupational therapy are often used. In some cases, medications like Risperidone (Risperdal) may be prescribed to manage symptoms.
8. Psychotic disorders: Other antipsychotic medications like Quetiapine (Seroquel) or Olanzapine (Zyprexa) may be considered. Psychotherapy can also be helpful.
9. Delusional disorder: Antipsychotics such as Aripiprazole (Abilify) or Risperidone (Risperdal) are often used. Psychotherapy is also a key part of treatment.
10. Bipolar disorder: Mood stabilizers like Lithium or anticonvulsants such as Valproate (Depakote) are common alternatives. Psychotherapy and lifestyle changes, such as maintaining a regular sleep schedule, can also help manage symptoms.

Recent Updates on Pimozide Research

Recent studies have focused on the long-term safety and effectiveness of Pimozide, particularly in treating Tourette syndrome and other tic disorders. Research indicates that while Pimozide can effectively reduce tics, newer medications like Aripiprazole (Abilify) may offer similar benefits with fewer side effects. Ongoing studies are also exploring genetic factors that may influence how patients respond to Pimozide, potentially leading to more personalized treatment plans in the future.

It’s important to stay informed about the latest research and discuss any concerns with your healthcare provider. If you have questions about whether Pimozide is right for you, schedule a telemedicine visit with one of our providers today.

James Kingsley

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