How is she doing?
Clean to wounds and treat with plain neosporin or vetericyn. Tylenol should be stopped in my opinion.
You can also use a little blu kote to help hide any pecking wounds.
Any idea why she was attacked? Evaluate the space in your coop/run, sometimes not having enough space can cause pecking/attacking. Also monitor your chick for any signs of illness/weakness, other chickens can pick up on that as well.
Is she by any chance new or a lone add-in to the flock?
If you feel like you need to give her pain medication you can use aspirin:
Used as a general treatment for reducing distress conditions of birds (fever or listlessness) that accompanies many diseases.
Dissolve five (5 grain) aspirin tablets in one gallon of water.
Offer this solution free-choice to the birds for the duration of an illness. The solution aspirin equivalent to 25 grains/gallon or 324 mg/gallon of drinking water. The dosage rate is about 25 mg/lb body weight per day. (http://extension.msstate.edu/content/solutions-and-treatments)