my dd's the same, one taste of her usual yogurt or juice and she can TELL there's med in it! She won't let us do anything to her - no temperature taking, no medicine, nothing.
I tried various things, and eventually got the medecine into her. I caved into mixing the medecine into a very small portion of yogurt-pudding (I live in Italy), and she ate it all, so I was sure she got the dose. Otherwise, the syringe thing works, just try and squirt the stuff into the side of the mouth, between cheek and teeth. Otherwise they just spit it right out. She had to be held still for that, 'cause there was just no other way.