First of all, Ornidazole is an oral drug for treating bacterial vaginitis or trichomonas vaginitis. If a woman is allergic to Ornidazole, it is recommended that she stops taking the drug immediately and can continue to take Tinidazole under the guidance of a doctor because Tinidazole is also capable of treating these vaginitis. If you are also allergic to tinidazole, you can choose vaginal administration, such as the use of metronidazole effervescent tablets for vaginal administration, so as to control the further development of inflammation.