Sodium Pentothal, aka Thiopental, Thiopentone, Trapanal and Fatal-Plus can, also, be used as a (anaesthetic) truth serum. As with most anaesthetic drugs its side-effects can range from and include headache, agitated emergence (a form of delirium) prolonged somnolence (drowsiness/sleepiness) and nausea (queasiness /motion sickness) cardiovascular (heart) and respiratory (breathing) depression, hypotension (unusually low blood pressure), apnea, a form of temporary cessation (stopping/ending) of breathing, especially during sleep and airway obstruction.
Oedipus, from Greek mythology, accidentally fulfills a prophecy of killing his father and, unknowingly, marries his mother.