<p>Hypersensitivity reactions have been reported. Other adverse reactions to thiopental sodium include the followings: respiratory depression, myocardial depression, cardiac arrhythmias, prolonged somnolence and recovery, hypotension, tachycardia, sneezing, coughing, bronchospasm, laryngospasm and shivering. Anaphylactic reactions have been reported. Symptoms, e.g., urticaria, bronchospasm, vasodilation and edema.</p>