Hi, thanks for using healthcare magic
Though he received an extra dose accidentally, he is not likely to experience any significant side effects because it would be under his total 24 hr dose.
You may have to consider skipping the next dose to avoid overstepping his total 24 hr dose but can use the one after that if he needs it.
If he remains febrile, you can use tepid sponging, allow him to wear cool clothes, avoid hot beverages and allow the use of cool/cold
liquids, use a fan.
I hope this helps