Risperdal (Risperidone)

Risperdal (Risperidone) Medication Information

Uses

Risperdal is an atypical antipsychotic that is used to treat schizophrenia, bipolar disorder, and irritability caused by autism. 

Dosage

The tablets are available in several different strengths:

• 0.25 mg
• 0.5 mg
• 1 mg
• 2 mg
• 3 mg
• 4 mg

Side Effects

The most common side effects of Risperdal include:

• Nausea
• Dizziness
• Tremor
• Constipation
• Parkinsonism
• Akathisia
• Somnolence
• Agitation 

Speak with your doctor for a full list of side effects that apply to you if you are taking Risperdal.

Precautions

Risperdal can cause movement disorders that in some cases are not reversible. If you notice movements that are unvoluntary report them to your doctor right away.

Risperdal, like other antipsychotics can cause an increase in blood sugar, which can lead to diabetes, or worsening of glucose control in those who have diabetes. 

In elderly patients with dementia, Risperdal can cause cardiovascular events which can lead to death.

Interactions

The most common drug interaction with Risperdal are included:

• Alcohol
• Levodopa/carbidopa
• Cimetidine
• Clozapine
• Fluoxetine
• Paroxetine
• Carbamazepine

Speak with your doctor for more information and before starting a new medication with Risperdal. 

Storage

Store at room temperature (59-77ºF). Risperdal should be protected from light.  

Pharmacist Tips

• Risperdal can cause a drop in blood pressure with posture changes, especially when initiating treatment. 
• Risperdal can affect motor movement, if changes occur let your doctor know immediately. 
• It is advised to avoid alcohol while taking Risperdal. 

Risperidone FAQs

Why do you take Risperdal at night?

Risperdal can cause drowsiness, so it is recommended to take it during the night to avoid this side effect. 

Does Risperdal work immediately?

It can take up to 6 weeks to see the full effect of Risperdal.

What does Risperdal do to the brain?

Risperdal decreases the amount of dopamine in the brain, which is a neurotransmitter connected with schizophrenia and bipolar disease. 

Is Risperdal like Xanax?

Risperdal is an antipsychotic, and Xanax is a benzodiazepine, they are not similar medications, and they are used to treat different things. 

Does Risperdal calm you down?

Risperdal can calm patients down if they are agitated, and it is used to treat psychosis in patients with schizophrenia. 

Related Drugs

• Abilify
• Geodon
• Latuda
• Seroquel
• Saphris
• Zyprexa

Reference:

Risperdal {package insert}. Titusville, NJ: Janssen Pharmaceuticals; 2007.

https://www.accessdata.fda.gov/drugsatfda_docs/label/2009/020272s056,020588s044,021346s033,021444s03lbl.pdf