Risperidone 2mg 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 H1 histaminergic receptors. Antagonism at 5-HT2A and D2 receptors is thought to be responsible for its antipsychotic effects. The 5-HT2A antagonism may reduce extrapyramidal symptoms (EPS) and improve negative symptoms compared to typical antipsychotics.

Urgent Side Effects: Seek Medical Help Right Away

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

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
+ Trouble 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
+ Passing urine more often
+ Flushing or fast breathing
+ Breath that smells like fruit
Severe dizziness or passing out
Changes in behavior or mood
Shakiness, trouble moving around, or stiffness
Urination problems (difficulty starting or stopping urine flow) or changes in urine output
Trouble swallowing or speaking
Difficulty focusing
Seizures
Changes in eyesight
Shortness of breath
Drooling
Feeling extremely hot or cold
Hormonal changes, such as:
+ Enlarged breasts or nipple discharge
+ Erectile dysfunction or menstrual changes
+ Decreased interest in sex or ejaculation problems
Prolonged or painful erections (lasting more than 4 hours), which can lead to permanent sexual dysfunction if not treated promptly

Neuroleptic Malignant Syndrome (NMS): A Rare but Serious Condition

NMS is a potentially life-threatening condition that requires immediate medical attention. Call your doctor right away if you experience:

Fever
Muscle cramps or stiffness
Dizziness
Severe headache
Confusion or changes in thinking
Fast or irregular heartbeat
Excessive sweating

Low White Blood Cell Count: Increased Risk of Infection

Drugs like this one can cause a decrease in white blood cell count, increasing the risk of infection. If you have a history of low white blood cell count, inform your doctor. Seek medical attention immediately if you experience signs of infection, such as:

Fever
Chills
Sore throat

Tardive Dyskinesia: A Rare but Serious Muscle Disorder

Tardive dyskinesia is a condition characterized by involuntary muscle movements. The risk is higher in people with diabetes, older adults (especially older females), and those taking higher doses or using the medication for extended periods. Call your doctor right away if you experience:

Trouble controlling body movements
Problems with your tongue, face, mouth, or jaw, such as:
+ Tongue sticking out
+ Puffing cheeks
+ Mouth puckering
+ Chewing movements

Other Possible Side Effects

While many people may not experience side effects or may only have mild side effects, it's essential to report any concerns to your doctor. Common side effects include:

Weight gain
Restlessness
Dizziness, sleepiness, tiredness, or weakness
Anxiety
Constipation, diarrhea, stomach pain, upset stomach, or vomiting
Heartburn
Dry mouth
Appetite changes
Signs of a common cold
Headache
Trouble sleeping
* Back, muscle, arm, or leg pain

If you experience any side effects that bother you or do not go away, contact your doctor for medical advice. You can also report side effects to the FDA at 1-800-332-1088 or 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 assess potential interactions between this medication and other substances you are taking.
* 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 safely with all your other medications and health conditions. Never start, stop, or adjust the dosage of any medication without first consulting your doctor.

Important Warnings and Cautions

It is essential to inform all your healthcare providers, including doctors, nurses, pharmacists, and dentists, that you are taking this medication.

To ensure your safety, avoid driving and other activities that require alertness until you understand how this medication affects you. When changing positions, such as standing up from a sitting or lying down position, do so slowly to minimize the risk of dizziness or fainting. Be cautious when navigating stairs.

The full effects of this medication may not be apparent for several weeks.

There is a potential risk of developing high blood sugar or diabetes, high cholesterol, and weight gain with the use of this medication, which may increase the risk of heart and brain blood vessel disease. As directed by your doctor, monitor your blood sugar levels regularly. Additionally, have your blood work checked as recommended by your doctor and discuss the results with them.

It is recommended to 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.

In hot weather or during physical activity, be mindful of your fluid intake to prevent dehydration. Drink plenty of fluids to avoid fluid loss.

This medication may cause dizziness, drowsiness, and impaired balance, which can increase the risk of falls and subsequent injuries, such as fractures.

Older adults with dementia who take medications like this one have a higher risk of experiencing strokes, which can be fatal. This medication is not approved for treating dementia-related mental health issues.

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

This medication may affect fertility, but this effect is reversible once the medication is discontinued. If you have concerns, discuss them with your doctor.

If you are pregnant, planning to become pregnant, or breastfeeding, inform your doctor. It is crucial to weigh the benefits and risks of this medication for both you and your baby. Taking this medication during the third trimester of pregnancy may lead to side effects or withdrawal symptoms in the newborn.

• CNS depressants (e.g., alcohol, benzodiazepines, opioids): Increased sedation and CNS depression.
• QT-prolonging drugs (e.g., Class IA and III antiarrhythmics, moxifloxacin, thioridazine): Increased risk of QT prolongation and arrhythmias.
• Strong CYP2D6 inhibitors (e.g., fluoxetine, paroxetine): May increase risperidone plasma concentrations.
• Strong CYP3A4 inducers (e.g., carbamazepine, rifampin, phenytoin): May decrease risperidone and active metabolite plasma concentrations, reducing efficacy.

• Antihypertensives: Additive hypotensive effects.
• Levodopa and dopamine agonists: Risperidone may antagonize their effects.
• Cimetidine, ranitidine: May increase risperidone plasma concentrations (minor effect).
• Verapamil: May increase risperidone and 9-hydroxyrisperidone plasma concentrations.

• Not specifically categorized as minor, but general caution with drugs affecting electrolyte balance (e.g., diuretics) due to potential for QT prolongation risk.

• Sedation/Drowsiness
• Dizziness/Lightheadedness (especially upon standing)
• Extrapyramidal symptoms (tremor, rigidity, akathisia, dystonia)
• Tardive dyskinesia (involuntary movements, especially of face and tongue)
• Neuroleptic Malignant Syndrome (fever, muscle rigidity, altered mental status, autonomic instability)
• Hyperglycemia (increased thirst, urination, hunger)
• Dyslipidemia
• Weight gain
• Hyperprolactinemia (galactorrhea, amenorrhea, sexual dysfunction, gynecomastia)
• QT prolongation symptoms (palpitations, syncope)
• Seizures
• Priapism

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 breast milk. The decision to breastfeed should consider the developmental and health benefits of breastfeeding, the mother’s clinical need for risperidone, and any potential adverse effects on the breastfed infant from risperidone or from the underlying maternal condition. Monitor breastfed infants for sedation, poor feeding, and developmental milestones.

Approved for schizophrenia (adolescents 13-17 years), bipolar mania (adolescents 13-17 years), and irritability associated with autistic disorder (children 5-16 years). Dosing is weight-based for autism. Monitor for weight gain, metabolic changes, and hyperprolactinemia, which may be more pronounced in children and adolescents.

Elderly patients with dementia-related psychosis treated with risperidone are at an increased risk of death (Black Box Warning). Not approved for this indication. For other indications, lower initial doses and slower titration are recommended due to increased sensitivity to adverse effects (e.g., orthostatic hypotension, sedation, EPS). Increased risk of cerebrovascular adverse events (e.g., stroke, TIA) in elderly patients with dementia.

• Risperidone is available as tablets, orally disintegrating tablets (M-TAB), and oral solution, offering flexibility for patients with swallowing difficulties.
• The active metabolite, 9-hydroxyrisperidone (paliperidone), has a significantly longer half-life, contributing to the drug's sustained effect.
• Monitor for hyperprolactinemia, which can lead to sexual dysfunction, amenorrhea, galactorrhea, and gynecomastia. Consider baseline and periodic prolactin levels, especially if symptoms arise.
• Metabolic monitoring (weight, glucose, lipids) is crucial due to the risk of metabolic syndrome, a class effect of atypical antipsychotics.
• Titrate dose slowly, especially in elderly or renally/hepatically impaired patients, to minimize adverse effects like orthostatic hypotension and sedation.
• Be vigilant for extrapyramidal symptoms (EPS) and tardive dyskinesia (TD). Use AIMS scale for routine TD screening.
• Educate patients on the importance of adherence and not discontinuing the medication abruptly.

• Other atypical antipsychotics (e.g., Olanzapine, Quetiapine, Aripiprazole, Ziprasidone, Lurasidone, Cariprazine, Brexpiprazole)
• Typical antipsychotics (e.g., Haloperidol, Chlorpromazine) - generally less preferred due to higher EPS risk.
• Mood stabilizers (e.g., Lithium, Valproate, Carbamazepine) for bipolar disorder.
• SSRIs/SNRIs for co-occurring anxiety/depression (if indicated and appropriate).

If your symptoms or health issues persist or worsen, it is essential to contact your doctor for further guidance. To ensure your safety, never share your medication with others or take someone else's medication. Some medications may come with an additional patient information leaflet, so it's a good idea to check with your pharmacist. If you have any questions or concerns about this medication, don't 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 seeking help, be prepared to provide information about what was taken, the amount, and the time it happened.