Still the most potent anti-biotic on the planet is plain old penicillin. And no, Amoxycillin and all its derivatives aren't the same and aren't better. UNLESS you are allergic to penicillin. Then you have no choice. Thing is, penicillin is about a nickel a pill and it works much faster. No money in it for the drug companies.
Same with sweeteners. Still the safest on the market is saccharin. But the patent ran out on it so the drug companies again needed a way to make money.