so my lo got his 4 month shots yesterday and now has a fever of 100.9. Per what the dr has said we have been giving him Tylenol every 4 hours. He hates it

we use the syringe and I try to put it in his cheek but he spits a lot out. Any advice on how to get him to keep it down?
Re: Tylenol tips
https://www.amazon.com/gp/aw/d/B000VBGT3K/ref=mp_s_a_1_1_a_it?qid=1458847744&sr=8-1&keywords=munchkin+medicine+dispenser&pi=SY200_QL40
I did it as far back on her cheek as I could get without feeling like I was gonna choke her, then popped a boob in her mouth immediately after. It helps to have a lot of experience giving pills to cats (though they got tuna, not boob, LOL)