The difference between metronidazole and tinidazole is mainly that tinidazole is an upgraded version of metronidazole with fewer side effects, although tinidazole is relatively expensive.
Both metronidazole and tinidazole are synthetic nitroimidazole antibiotics, capable of treating anaerobic infections, but also resistant to parasitic infections such as trichomonas and amoebas, and both are basically the same in terms of use.
Metronidazole belongs to the 1st generation of nitroimidazole antibiotics, tinidazole belongs to the 2nd generation, and ornidazole belongs to the 3rd generation. Tinidazole is a derivative of metronidazole, and its antibacterial and antiparasitic effects are stronger than those of metronidazole, and side effects are relatively rare. However, Tinidazole is an upgraded product, so its price is relatively higher than that of Metronidazole.
Regardless of whether you are using metronidazole or tinidazole, you should not consume alcohol during the medication period, otherwise there is a risk of disulfiram-like reactions.