system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
In a patient suffering from rheumatic heart disease who has to undergo dental treatment, when are prophylactic drugs given? (Or) A 40kg man with prosthetic heart, antibiotics are given for extraction of tooth how many hours before the procedure?
assistant
The correct answer is  None