How old is your wife? Is she taking any other medicines?
If your wife is not allergic to penicillins, single dose of 1700mg of amoxicillin is most probably not a cause to worry. Moreover if she is currently not on any medication and is not suffering from any chronic kidney diseases she will be just fine. Though there may be some GI upset like diarrhea, nausea etc there is possibly no substantial harm of single overdose of amoxycillin as reported by you.
Hope you are satisfied with this awnser.
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