Key takeaways
Talicia (omeprazole/amoxicillin/rifabutin) and metronidazole (Flagyl) are both antibiotics, but they treat different types of infections and have different compositions. Talicia is a combination of three medications: omeprazole, amoxicillin, and rifabutin, and is used specifically to treat *Helicobacter pylori* (H. pylori) stomach infections. It is only available as a brand name medication and can be expensive. On the other hand, metronidazole (Flagyl) is a single medication that treats a variety of bacterial and parasitic infections, including bacterial vaginosis and trichomoniasis. Metronidazole is available as a lower-cost generic. Talicia is taken as four capsules every 8 hours for 14 days. Metronidazole is also taken every 8 hours, with the dosage and treatment length varying based on the infection. Talicia cannot be used if you have a penicillin allergy, whereas metronidazole has a serious interaction with alcohol and should not be taken with disulfiram. Both medications have common side effects like headache and diarrhea, but Talicia can also cause urine discoloration, and metronidazole can cause a metallic taste in the mouth.
