If your symptoms do not improve within a few days, or if they become worse, check with your doctor.
You should not take this medicine during the first trimester (3 months) of pregnancy. Using this medicine while you are pregnant can harm your unborn baby. Use an effective form of birth control to keep from getting pregnant. If you think you have become pregnant while using the medicine, tell your doctor right away. Also, do not breastfeed while using this medicine. Wait at least three days after you stop taking this medicine before you breastfeed .
Tinidazole may cause a vaginal yeast infection. Check with your doctor right away if you are having itching of the vagina or outside genitals; pain during sexual intercourse; or thick, white curd-like vaginal discharge without odor or with mild odor .
Drinking alcoholic beverages or using preparations that contain propylene glycol while taking this medicine may cause stomach pain, nausea, vomiting, headache, or flushing or redness of the face. Other alcohol-containing preparations (for example, elixirs, cough syrups, tonics) may also cause problems. These problems may last for at least 3 days after you stop taking tinidazole. Also, this medicine may cause alcoholic beverages to taste different. Therefore, you should not drink alcoholic beverages or use other alcohol or propylene glycol-containing preparations while you are taking this medicine and for at least 3 days after stopping it.
If you are taking this medicine for trichomoniasis (an infection of the sex organs in males and females), your doctor may want to treat your sexual partner at the same time you are being treated, even if he or she has no symptoms. Also, it may be desirable to use a condom (prophylactic) during intercourse. These measures will help keep you from getting the infection back again from your partner. If you have any questions about this, check with your doctor.
Before you have any medical tests, tell the medical doctor in charge that you are taking this medicine. The results of some tests may be affected by this medicine .