There is no such thing as which drug is the safest for quadruple therapy, and the specific dosing regimen for quadruple therapy is closely related to whether or not the patient develops drug resistance and drug allergies.
Quadruple therapy refers to a quadruple regimen that eradicates H. pylori and contains bismuth. That is, a proton pump inhibitor and two antibiotics and a bismuth agent in a course of about ten to fourteen days. Since the resistance to various antibiotics varies, as does the health of the individual, the medication needs to be administered according to the doctor’s prescription.
There are four commonly used antimicrobial drug composition regimens: amoxicillin and clarithromycin, amoxicillin and levofloxacin, amoxicillin and furazolidone, and tetracycline and metronidazole or furazolidone. Antimicrobials need to be taken with a meal. Proton pump inhibitors and bismuth need to be taken half an hour before meals as prescribed by the doctor.
Alcohol consumption is prohibited during quadruple drug therapy, in addition to avoiding cold, spicy and stimulating foods to minimize stimulation of the gastric mucosa.