Colds and flus are NOT cured by antibiotics.
Antibiotics - colds and flu
Antibiotics will fight bacterial infections, but they do not treat viral infections such as
Antibiotics can destroy normal ("healthy") bacteria that live in your body. This can result in symptoms such as nausea, diarrhea, and vaginal yeast infections.
The overuse of antibiotics has contributed to the rise in drug-resistant bacterial infections. Taking antibiotics also poses a risk of allergic reactions, so they should not be taken when there is no possible benefit.