Could a side effect of an antibiotic be lack of appetite and drowsiness?

If the son takes an antibiotic, then, most likely, he is sick - he has a bacterial infection. The disease itself can cause lethargy and appetite disorders. Amosiklav is unlikely to cause drowsiness, or at least such a side effect has not been recognized and described in the drug documentation, but it can cause nausea or indigestion symptoms responsible for lack of appetite. However, the feeling of drowsiness is very common after Rispolept, which can also cause changes in appetite. Hitaxa should not affect drowsiness, and when it comes to appetite, in some people it can rather increase it. If something in the child's behavior worries you, and unusual habits persist, then perhaps it is worth contacting a pediatrician. I enclose additional information: https://www.gdziepolek.pl/artykuly/fakty-i-mity-o-antybiotykach https://www.gdziepolek.pl/artykuly/jak-i-dlaczego-zglaszac-dzialania-niepozadane https://www.gdziepolek.pl/artykuly/czy-bac-sie-dzialan-niepozadanych-lekow