Risperidone ER 50mg Inj Susp Kit

Risperidone is a selective monoaminergic antagonist with high affinity for serotonin 5-HT2A and dopamine D2 receptors. It also antagonizes alpha1-adrenergic and, to a lesser extent, H1 histaminergic and alpha2-adrenergic receptors. Antagonism at other receptors is less potent. The therapeutic effect in schizophrenia is believed to be mediated through a combination of D2 and 5-HT2A receptor antagonism.

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 or seek medical attention immediately:

Signs of an allergic reaction, such as:
+ Rash
+ Hives
+ Itching
+ Red, swollen, blistered, or peeling skin with or without fever
+ Wheezing
+ Tightness in the chest or throat
+ Trouble breathing, swallowing, or talking
+ Unusual hoarseness
+ Swelling of the mouth, face, lips, tongue, or throat
Signs of high blood sugar, including:
+ Confusion
+ Feeling sleepy
+ Unusual thirst or hunger
+ Passing urine more often
+ Flushing
+ 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, such as inability to pass urine 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
+ Nipple discharge
+ Erectile dysfunction or changes in menstrual cycle
Sexual problems, including:
+ Decreased interest in sex
+ Ejaculation problems
Prolonged or painful erections (lasting more than 4 hours), which can lead to lasting sexual dysfunction if left untreated
Neuroleptic malignant syndrome (NMS), a rare but potentially life-threatening condition, characterized by:
+ Fever
+ Muscle cramps or stiffness
+ Dizziness
+ Severe headache
+ Confusion
+ Changes in thinking or heartbeat
+ Excessive sweating
Low white blood cell count, which can increase the risk of infection; if you have a history of low white blood cell count, inform your doctor and seek medical attention if you experience:
+ Fever
+ Chills
+ Sore throat
Tardive dyskinesia, a severe muscle problem, which may cause:
+ Uncontrollable 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, it's essential to be aware of the following potential side effects:

Weight gain
Restlessness
Dizziness, sleepiness, tiredness, or weakness
Anxiety
Gastrointestinal problems, such as:
+ Constipation
+ Diarrhea
+ Stomach pain
+ Upset stomach
+ Vomiting
Heartburn
Dry mouth
Changes in appetite
Common cold symptoms
Headache
Sleep disturbances
Back, muscle, arm, or leg pain
Irritation at the injection site

If you experience any of these side effects or have concerns, contact your doctor or seek medical attention. 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 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.

It is essential to inform all your healthcare providers, including doctors, nurses, pharmacists, and dentists, that you are taking this medication. This will help ensure your safety and prevent any potential interactions with other treatments.

When starting this medication, be cautious when performing tasks that require your full attention, such as driving, until you understand how it affects you. To minimize the risk of dizziness or fainting, get up slowly from a sitting or lying position, and be careful when navigating stairs.

You may not experience the full effects of this medication for several weeks. Additionally, be aware that medications like this one have been associated with increased risks of high blood sugar, diabetes, high cholesterol, and weight gain, which can contribute to heart and brain blood vessel disease.

As directed by your doctor, monitor your blood sugar levels regularly. Also, follow your doctor's instructions for having blood work checked, and discuss any concerns or questions you may have with your doctor.

It is recommended to avoid consuming alcohol while taking this medication. Before using marijuana, cannabis, or any prescription or over-the-counter drugs that may cause drowsiness, consult with your doctor to ensure safe use.

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

This medication may cause dizziness, drowsiness, and impaired balance, which can increase the risk of falls and related 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. Note that 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. This medication may also affect fertility, but this effect is reversible once the medication is stopped. If you have 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 of this medication to both 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., paroxetine, fluoxetine): May increase risperidone and 9-hydroxyrisperidone levels. Consider dose reduction.
• Strong CYP3A4 inducers (e.g., carbamazepine, rifampin, phenytoin): May decrease risperidone and 9-hydroxyrisperidone levels. May require dose increase.
• Drugs that prolong QT interval (e.g., Class IA and III antiarrhythmics, some antipsychotics, moxifloxacin): Increased risk of arrhythmias.
• CNS depressants (e.g., alcohol, opioids, benzodiazepines): Additive sedative effects.
• Antihypertensives: Enhanced hypotensive effects due to alpha-adrenergic blockade.

• Moderate CYP2D6 inhibitors (e.g., quinidine): May increase risperidone levels.
• Moderate CYP3A4 inhibitors (e.g., ketoconazole, itraconazole): May increase risperidone levels.
• Levodopa and dopamine agonists: Risperidone may antagonize their effects.
• Cimetidine, ranitidine: May increase risperidone bioavailability (oral).

• Psychotic symptoms (hallucinations, delusions, disorganized thought)
• Mood stabilization (for bipolar disorder)
• Sedation/somnolence
• Dizziness/orthostatic hypotension
• Weight changes
• Movement disorders (tremor, rigidity, akathisia, dystonia, tardive dyskinesia)
• Sexual dysfunction
• Menstrual irregularities/galactorrhea
• Injection site reactions (pain, swelling, redness)
• Signs of Neuroleptic Malignant Syndrome (NMS): fever, muscle rigidity, altered mental status, autonomic instability

Category C. 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. 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.

Safety and efficacy of risperidone extended-release injectable suspension have not been established in pediatric patients. Oral risperidone is approved for specific pediatric indications (e.g., schizophrenia in adolescents 13-17 years, bipolar mania in adolescents 10-17 years, irritability associated with autistic disorder in children/adolescents 5-16 years).

Elderly patients with dementia-related psychosis treated with antipsychotic drugs are at an increased risk of death. Risperidone is not approved for this indication. Increased risk of cerebrovascular adverse events (e.g., stroke, transient ischemic attack) in elderly patients with dementia. Increased sensitivity to orthostatic hypotension and other adverse effects. Use lower initial doses and titrate cautiously.

• Risperidone ER injection requires 3 weeks of oral risperidone co-administration after the first injection to ensure therapeutic levels are reached.
• The injection must be administered deep intramuscularly into the deltoid or gluteal muscle, alternating sites.
• Do not administer intravenously.
• Patients should be monitored for metabolic side effects (weight gain, hyperglycemia, dyslipidemia) and movement disorders (EPS, TD).
• Hyperprolactinemia is a common side effect and can lead to sexual dysfunction, amenorrhea, galactorrhea, and gynecomastia.
• Orthostatic hypotension is a risk, especially during initial titration; advise patients to rise slowly.
• This formulation is beneficial for patients with adherence challenges to daily oral medication.

• Other atypical antipsychotics (e.g., olanzapine, quetiapine, aripiprazole, ziprasidone, lurasidone, cariprazine, brexpiprazole)
• Other long-acting injectable antipsychotics (e.g., paliperidone palmitate, olanzapine pamoate, aripiprazole lauroxil)
• Typical antipsychotics (e.g., haloperidol, fluphenazine)

If your symptoms or health problems persist or worsen, it is essential to contact your doctor for further guidance. To ensure safe use, never share your medication with others, and do not take medication prescribed to someone else. Store all medications in a secure location, out of reach of children and pets, to prevent accidental ingestion. Dispose of unused or expired medications properly. Unless instructed to do so by a healthcare professional, do not flush medications down the toilet or pour them down the drain. If you are unsure about the correct disposal method, consult your pharmacist for advice. Many communities have drug take-back programs, which your pharmacist can help you locate. Some medications may come with an additional patient information leaflet; check with your pharmacist to see if this applies to your prescription. If you have any questions or concerns about your medication, discuss them with your doctor, nurse, pharmacist, or other healthcare provider. In the event of a suspected overdose, immediately contact your local poison control center or seek emergency medical attention. Be prepared to provide information about the medication taken, the amount, and the time it was taken to ensure prompt and effective treatment.