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
Which drug is not effective against H. pylori:
assistant
The correct answer is  Answer is D (Erythromycin): The most successful are the Triple and Quadruple multi-drug regimens: Name Drug 1 Drug 2 Drug 3 Drug 4 OCA Omeprazole (20 mg BD) Clarithromycin (500 mg BD) Amoxicillin (1g BD) OCM Omeprazole (20 mg BD) Clarithromycin (500 mg BD) Metronidazole (500 mg BD) OBTM Omeprazole (20 mg BD) Bismuth Subsalicylate (2 tabs QID) Tetracycline (500 mg Q1D) Metronidazole