Hello
Metronodazole is used for many purposes including for
amoebiasis and pseumonas infectionand also dental infection.
Nausea , vomiting , headache , unpleasant
metallic taste , diarrhea, abdominal discomfort ,
hypersensitivity reaction, allergy are most common side effect of this drug beside
stomatitis due to over growth of candida. ataxia ,
dizziness .
In your case headache , nausea , flu like symptoms are due to the side effects of METRONIAZOLE . So its a good thing that you stopped it .
Now for blood shots in the eyes and for other symptoms , take levoceterizine 5 mg once or twice in day for 1-2 day .
For dental problem consult your dental surgeon and get his opinion.