Olnee 2.5mg Tablet is a medication used to treat schizophrenia and mania. It is taken with or without food, and should be taken at the same time daily to maintain a consistent level. Common side effects include dry mouth, constipation, muscle rigidity, and restlessness. It may cause sudden blood pressure drops and dizziness, so it's best to rise slowly. Modifying lifestyle with a healthy diet and regular exercise can reduce side effects. In rare cases, it may cause serious side effects.