An overdose of 45 diazepam tablets is a life-threatening medical emergency. Go to the nearest emergency room immediately; do not induce vomiting. Immediate hospital treatment focuses on supportive care, including airway management, oxygen, intravenous fluids, and continuous monitoring of vital signs. The specific antidote for benzodiazepines like diazepam is Flumazenil. However, doctors use Flumazenil with extreme caution because it can precipitate severe, potentially life-threatening seizures, especially in chronic users. Prompt, professional medical intervention is critical for survival.