 Other side effects may include drowsiness, anxiety, emotional blunting (apathy/anhedonia), confusion, restlessness, dizziness, akathisia, hypersensitivity, changes in appetite and weight, sweating, muscle twitches, weakness, nausea and vomiting, hypotension, tachycardia, and rarely, irregular heart rhythms.Twitching, hallucinations, delirium and coma are also some of the toxic effects caused by overdose.Rhabdomyolysis or muscle breakdown has been rarely reported with this class of drugs as well.