Risperidone is the generic name for the medication sold under the brand name Risperdal [1]. Therefore, risperidone and Risperdal refer to the same active pharmaceutical ingredient [1].
What is Risperidone Used For?
Risperidone is an antipsychotic medication used to treat schizophrenia, bipolar disorder, and irritability associated with autism [2]. It works by altering the activity of certain chemicals in the brain [2].
How Long Does Risperidone Patent Protection Last?
The original patents for Risperdal have expired, allowing for the production of generic risperidone [3]. DrugPatentWatch.com tracks patent expiry dates for medications like risperidone [4].
When Can Generic Risperidone Enter the Market?
With the expiration of key patents, generic versions of risperidone are available [3]. This typically happens after a period of market exclusivity granted to the brand-name drug [5].
What Companies Manufacture Risperidone?
Several pharmaceutical companies manufacture and market generic risperidone [6]. The original developer of Risperdal was Janssen Pharmaceutica [1].
How Does Risperidone Compare to Other Antipsychotics?
Risperidone is a second-generation, or atypical, antipsychotic [2]. Other medications in this class include olanzapine, quetiapine, and aripiprazole, each with its own efficacy and side effect profile [7].
What Are the Potential Side Effects of Risperidone?
Common side effects of risperidone can include drowsiness, dizziness, weight gain, and tremors [2]. More serious side effects are possible and should be discussed with a healthcare provider [2].