Wayne, maybe you could ask the vet to dispense the antibiotic in pill form . . . if she is not a good pill taker here is my method:

Take 2 Whisker Lickins cat treats, sandwich the pill between them and gently press the pliable treats between both thumbs and forefingers so that the warmth of your fingertips allows you to press and mold the treats around the pill . . . then I just put the rounded treat (with pill hidden in the middle . . . ) down and my cats will eat it.

I'm glad the vet has her on medication which should relieve your mind, but getting cats to TAKE their meds is such a task! Hope this helps and that Tiger is feeling better soon.