Try the syringe again...but this time be sure to put it along the side of the mouth closer to the back. You will have to use some tricks to get her to open her mouth...distraction and "fake outs" will usually work (pretending to give her the paci so that she opens her mouth....)
Squeeze the meds along the side of her cheek then pull out the syringe and gently blow a puff of air into her face. She own't like it...but it will make her swallow. With you putting it on the side it is nearly impossible for them to work it out of their mouths.
We took a LOT of meds including reflux and heart neds in the first year. The syringe on the side worked the best.
Another tip...put the med on a baby spoon and let her suck it off. The key to this trick is to GIVE the baby the spoon. They will have very little interest is they can't "control" the spoon and play with it. You just hold on to it long enough to make sure that the med gets in their mouth and then let them chew on it and play with it a bit (under your supervision of course!!!).