Risperidone ODT 0.25mg Tablets

Risperidone is a selective monoaminergic antagonist with high affinity for serotonin 5-HT2A and dopamine D2 receptors. It also antagonizes alpha1-adrenergic, alpha2-adrenergic, and histaminergic H1 receptors. Its antipsychotic activity is believed to be mediated through a combination of D2 and 5-HT2A antagonism. The active metabolite, 9-hydroxyrisperidone (paliperidone), has a similar receptor binding profile.

Urgent Side Effects: Seek Medical Help Right Away

Although rare, some people may experience severe and potentially life-threatening side effects while taking this medication. If you notice any of the following symptoms, contact your doctor immediately or seek emergency medical attention:

Signs of an allergic reaction, such as:
+ Rash or hives
+ Itching or red, swollen, blistered, or peeling skin (with or without fever)
+ Wheezing or tightness in the chest or throat
+ Difficulty breathing, swallowing, or talking
+ Unusual hoarseness or swelling of the mouth, face, lips, tongue, or throat
Signs of high blood sugar, including:
+ Confusion or feeling sleepy
+ Unusual thirst or hunger
+ Frequent urination or flushing
+ Rapid breathing or breath that smells like fruit
Severe dizziness or fainting
Changes in behavior or mood
Shakiness, difficulty moving, or stiffness
Urination problems (inability to pass urine or changes in urine output)
Swallowing or speaking difficulties
Difficulty focusing
Seizures
Changes in vision
Shortness of breath
Drooling
Feeling extremely hot or cold
Breast changes (enlarged breasts, nipple discharge, or erectile dysfunction)
Menstrual changes or sex problems (decreased libido or ejaculation issues)
Prolonged or painful erections (lasting more than 4 hours), which can lead to permanent sexual dysfunction if not treated promptly

Serious but Rare Side Effects

Neuroleptic malignant syndrome (NMS), a potentially life-threatening condition, may occur. Seek medical help immediately if you experience:
+ Fever
+ Muscle cramps or stiffness
+ Dizziness
+ Severe headache
+ Confusion or changes in thinking
+ Rapid or irregular heartbeat
+ Excessive sweating
Low white blood cell counts, which can increase the risk of infection, have been reported with this medication. Inform your doctor if you have a history of low white blood cell counts. Seek medical attention if you experience:
+ Fever
+ Chills
+ Sore throat
Tardive dyskinesia, a severe muscle disorder, may occur, especially in people with diabetes, older adults, and those taking higher doses or using the medication for an extended period. Contact your doctor immediately if you experience:
+ Uncontrolled body movements
+ Tongue, face, mouth, or jaw problems (such as tongue sticking out, puffing cheeks, mouth puckering, or chewing)

Other Possible Side Effects

While many people may not experience any side effects or only minor ones, some may occur. If you are concerned about any of the following side effects or if they persist, contact your doctor:

Weight gain
Restlessness
Dizziness, drowsiness, tiredness, or weakness
Anxiety
Constipation, diarrhea, stomach pain, upset stomach, or vomiting
Heartburn
Dry mouth
Changes in appetite
Common cold symptoms
Headache
Sleep disturbances
* Back, muscle, arm, or leg pain

Reporting Side Effects

If you have questions or concerns about side effects, contact your doctor. You can also report side effects to the FDA at 1-800-332-1088 or online at https://www.fda.gov/medwatch.

Before Taking This Medication: Important Information to Share with Your Doctor

It is essential to inform your doctor about the following:

Any allergies you have, including allergies to this medication, its components, or other substances, such as foods or drugs. Be sure to describe the symptoms you experienced as a result of the allergy.
All medications you are currently taking, including prescription and over-the-counter (OTC) drugs, natural products, and vitamins. This information will help your doctor and pharmacist identify potential interactions between this medication and other substances.
* Any existing health problems, as this medication may interact with certain conditions.

To ensure your safety, it is crucial to verify that this medication can be taken with all your current medications and health conditions. Never start, stop, or adjust the dosage of any medication without first consulting your doctor.

Important Information to Share with Your Healthcare Team

Inform all of your healthcare providers, including doctors, nurses, pharmacists, and dentists, that you are taking this medication. This will help ensure that you receive the best possible care.

Precautions to Take While Using This Medication

To avoid accidents, do not drive or perform tasks that require alertness until you know how this medication affects you. When getting up from a sitting or lying down position, rise slowly to reduce the risk of dizziness or fainting. Be cautious when climbing stairs.

Potential Side Effects and Risks

It may take several weeks to experience the full effects of this medication. Be aware that high blood sugar or diabetes, high cholesterol, and weight gain have been associated with medications like this one, which may increase the risk of heart and brain blood vessel disease.

Monitoring and Follow-Up

Follow your doctor's instructions for checking your blood sugar levels. Additionally, have your blood work checked as directed by your doctor and discuss the results with them.

Interactions with Other Substances

Avoid consuming alcohol while taking this medication. Before using marijuana, other forms of cannabis, or prescription or over-the-counter drugs that may cause drowsiness, consult with your doctor.

Special Precautions

In hot weather or during physical activity, be careful to avoid dehydration by drinking plenty of fluids. This medication may cause dizziness, drowsiness, and impaired balance, which can increase the risk of falls and related injuries.

Important Considerations for Specific Individuals

If you have phenylketonuria (PKU), consult with your doctor, as some products contain phenylalanine. Older adults with dementia who take medications like this one have a higher risk of stroke, which can be fatal. This medication is not approved for treating dementia-related mental health issues.

If you are 65 or older, use this medication with caution, as you may be more susceptible to side effects.

Pregnancy and Fertility

This medication may affect fertility, but this effect is reversible when the medication is stopped. If you have questions or concerns, discuss them with your doctor.

If you are pregnant, plan to become pregnant, or are breastfeeding, inform your doctor. You will need to discuss the potential benefits and risks to you and your baby. Taking this medication during the third trimester of pregnancy may cause side effects or withdrawal symptoms in the newborn.

• Strong CYP2D6 inhibitors (e.g., fluoxetine, paroxetine): May significantly increase risperidone plasma concentrations. Dose reduction of risperidone may be necessary.
• Strong CYP3A4 inducers (e.g., carbamazepine, rifampin, phenytoin): May significantly decrease risperidone and active metabolite plasma concentrations. Dose increase of risperidone may be necessary.
• Drugs that prolong QT interval (e.g., Class IA and III antiarrhythmics, moxifloxacin, thioridazine): Increased risk of cardiac arrhythmias.

• Other CNS depressants (e.g., alcohol, benzodiazepines, opioids, antihistamines): Additive sedative effects.
• Antihypertensives: Additive hypotensive effects due to alpha1-adrenergic blockade.
• Levodopa and dopamine agonists: Risperidone may antagonize their effects.
• Cimetidine, ranitidine: May increase risperidone levels (minor effect).

• Clozapine: May decrease risperidone clearance.

• Orthostatic hypotension (dizziness, lightheadedness upon standing)
• Extrapyramidal symptoms (tremor, rigidity, akathisia, dystonia, tardive dyskinesia)
• Neuroleptic Malignant Syndrome (fever, muscle rigidity, altered mental status, autonomic instability)
• Hyperglycemia (increased thirst, urination, hunger)
• Weight gain
• Sedation/Somnolence
• Prolactin elevation (galactorrhea, amenorrhea, gynecomastia, sexual dysfunction)
• Suicidal ideation (especially in children, adolescents, and young adults)
• Cardiac symptoms (palpitations, syncope)

Use during pregnancy only if the potential benefit justifies the potential risk to the fetus. Neonates exposed to antipsychotic drugs during the third trimester of pregnancy are at risk for extrapyramidal and/or withdrawal symptoms following delivery.

Risperidone and its active metabolite are excreted in human milk. Weigh the benefits of breastfeeding against the potential risks to the infant. Monitor breastfed infants for sedation, feeding difficulties, and developmental milestones.

Approved for specific indications (schizophrenia in adolescents 13-17 years, bipolar mania in children/adolescents 10-17 years, irritability associated with autistic disorder in children/adolescents 5-16 years). Close monitoring for weight gain, metabolic changes, and EPS is crucial. Long-term effects on growth and development are not fully established.

Elderly patients, especially those with dementia-related psychosis, are at increased risk of death when treated with antipsychotics (Black Box Warning). Increased risk of cerebrovascular adverse events (stroke, TIA) in elderly patients with dementia. Lower starting doses and slower titration are recommended due to increased sensitivity and potential for orthostatic hypotension and sedation.

• Risperidone ODT is bioequivalent to the conventional tablet and can be beneficial for patients with dysphagia or those who may 'cheek' medications.
• Metabolic monitoring (weight, glucose, lipids) is crucial due to the risk of weight gain, hyperglycemia, and dyslipidemia.
• Monitor for hyperprolactinemia, which can lead to sexual dysfunction, amenorrhea, galactorrhea, and gynecomastia.
• Orthostatic hypotension is common, especially during initial titration; advise patients to rise slowly.
• The active metabolite, 9-hydroxyrisperidone (paliperidone), has a long half-life, contributing to the sustained effect of risperidone.
• Consider CYP2D6 metabolizer status (poor vs. extensive) as it can significantly impact risperidone and 9-hydroxyrisperidone levels, though routine testing is not typically recommended.

• Other Atypical Antipsychotics (e.g., Olanzapine, Quetiapine, Aripiprazole, Ziprasidone, Lurasidone, Cariprazine, Brexpiprazole, Clozapine)
• Typical Antipsychotics (e.g., Haloperidol, Chlorpromazine) - generally less preferred due to higher EPS risk
• Mood Stabilizers (e.g., Lithium, Valproate, Carbamazepine - for bipolar disorder)
• Antidepressants (for mood disorders, often in combination with antipsychotics for bipolar depression)
• Psychotherapy (e.g., CBT, family therapy)

If your symptoms or health issues persist or worsen, it is essential to contact your doctor for further evaluation and guidance. To ensure your safety and the effectiveness of your treatment, never share your medication with others or take someone else's medication. Some medications may come with an additional patient information leaflet, so it is a good idea to consult with your pharmacist for more information. If you have any questions or concerns about your medication, do not hesitate to discuss them with your doctor, nurse, pharmacist, or other healthcare provider. In the event of a suspected overdose, immediately call your local poison control center or seek emergency medical attention. When reporting the incident, be prepared to provide details about the medication taken, the amount, and the time it occurred, as this information is crucial for receiving appropriate care.