Febrile seizures can occur with only a minimally elevated temperature. Febrile seizures usually occur when the fever goes up rapidly. That's why we usually get that ambulance call between 2am and 5am or late in the afternoon after a nap. They usually outgrow this propensity towards febrile seizures around the age of 3 years. Do not wrap him in heavy blankets.
Fever can cause insensible fluid loss.
It is ok to alternate these medicines every three hours or use one or the other medicine. Just because their child has a fever does not necessarily mean he has a bacterial infection. Antibiotics are used for bacterial infections not viruses. Help parents understand that the fast heart rate and breathing are a normal response to fever. Try not to roll your eyes.