Risperdal Consta is a long-acting injectable form of risperidone, an atypical antipsychotic medication. It is used to treat schizophrenia and schizoaffective disorder in adults [1]. The injection is administered every two weeks by a healthcare professional [2].
How does Risperdal injection work?
Risperdal Consta works by affecting dopamine and serotonin receptors in the brain [1]. By balancing these neurotransmitters, it helps to reduce symptoms such as hallucinations, delusions, and disorganized thinking [2].
How long does Risperdal injection stay in your system?
As a long-acting injectable, Risperdal Consta provides a steady release of medication over the two-week dosing interval. After the last injection, the drug is gradually eliminated from the body, but the exact duration can vary among individuals depending on metabolism and other factors [2].
What are the side effects of Risperdal injection?
Common side effects of Risperdal Consta include drowsiness, dizziness, weight gain, and tremors [2]. Less common but more serious side effects can include movement disorders like tardive dyskinesia, increased prolactin levels, and metabolic changes such as increased blood sugar and cholesterol [1][2].
How does Risperdal injection compare to oral Risperdal?
Risperdal Consta offers the advantage of less frequent dosing, which can improve adherence for some patients compared to daily oral risperidone. This also ensures a more consistent level of medication in the body. However, the injection requires administration by a healthcare provider and may have different side effect profiles or onset of action for some individuals [2].
When does the patent for Risperdal expire?
The original patents for risperidone have expired, allowing for the availability of generic versions of oral risperidone. However, specific long-acting injectable formulations like Risperdal Consta may have had their own patent protections. Information on the patent status of specific drug formulations can often be found through resources like DrugPatentWatch.com [3].
Who makes Risperdal injection?
Risperdal Consta was originally developed by Janssen Pharmaceutica, a subsidiary of Johnson & Johnson. Generic versions of long-acting risperidone injections may be available from other pharmaceutical manufacturers [1].