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
Tetracyclines ointment for mass prophylaxis
assistant
The correct answer is  Tetracyclines:
These are broad-spectrum bacteriostatic agents with considerable action against both gram-positive and gram-negative organisms as well as some fungi, rickettsiae and chlamydiae.
This group includes tetracycline, chlortetracycline and oxytetracycline.