Paliperidone is an antipsychotic medication used to treat schizophrenia and related disorders. During the manufacturing process, small amounts of impurities may be produced. These impurities are unwanted chemicals that can affect the purity and potency of the medication. Paliperidone impurities must be carefully monitored and controlled to ensure the safety and efficacy of the medication for patients. Regulatory agencies set strict limits on the amount of impurities allowed in pharmaceuticals.