Thank you for your question.
I am Dr. Su S. and I will try my best to help you.
Yes, aspirin should not be given to small children.
For children, we avoid aspirin because it can cause Reye syndrome.
One dose will not affect as she does not have any symptom of viral illness.
You can wait & watch.
Sometimes aspirin can cause gastritis.
If you feel she is having any abdomen pain or new symptom, please take her to doctor.
No need to take hospital now.
I hope this information will be helpful.
If you have any query, please feel free to ask.
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Wish her healthy life.