While haloperidol is effective for its intended uses, it can also cause several adverse effects and toxicities. Common side effects include drowsiness, dizziness, and dry mouth. However, more severe toxic effects can occur, especially at high doses or with prolonged use. These include extrapyramidal symptoms (such as tremors and rigidity), tardive dyskinesia, neuroleptic malignant syndrome, and cardiovascular effects like QT interval prolongation, which can lead to arrhythmias.
