Does she suck a dummy? if she does it can make things a bit easier as squeeze the panadol into the side of her mouth as she is sucking at the dummy..or pop a teat into her mouth (not attached to a bottle, just the teat) and put the panadol in the empty teat and that sometimes helps them to suck..
Don't forget that research shows that panadol should mostly be used for treatment of pain not fever alone..fever itself is beneficial in helping bub's body fight off the virus..but if she is really grizzly, panadol would definatley help her feel better...
Hope that helps...