Girls, how do you alternate children's fever reducers? I gave Ibuprofe…

Girls, how do you alternate children's fever reducers? I gave Ibuprofen, alternating with Panadol. But since today he doesn't help anymore, although it helped for 3 days before. Tomorrow we'll have blood drawn, don't know what that is, barely gets down, rises every 4 hours, cough started only today ?‍♀️ 2 days feverish, 2 days normal, now 2 days again fever + husband also sick like a child, though he has 37.3. He just rants, but just lying there ?? + all of this never had a fever, at 37.5 already starts. I start as soon as I see it getting down, but it gets