This combination product contains three substances: lansoprazole (ATC code: A02B C03), amoxicillin (ATC code: J01C A04) and metronidazole (ATC code: J01X D01). Lansoprazole is safety classified as Probably not porphyrinogenic (PNP), amoxicillin is safety classified as Not Porphyrinogenic (NP), while metronidazole is safety classified as Probably not porphyrinogenic (PNP). The classification of the combination is according to the most porphyrinogenic of the three substances. For more details please refer to the monographs of the three substances.