Agree with pp who said pushing fluids. Any fluids!!! Even ice cream counts.
Also, call your doctor before you do this, but our ped always has us alternate doses ibuprofen and acetaminophen (Motrin & Tylenol). Our DS spikes very high fevers and that’s how we keep them down. Again, ask your doctor if that would help. It has helped us control very stubborn fevers.
Ice cream doesn't count as a fluid. I wish it did, but it doesn't. Clear fluids is what is needed for fevers...water based.