In ancient times, what did foreigners use to cure diseases before they invented and discovered chemicals?

European ancient times also used herbs, drinking all kinds of alcohol also counts (vodka was originally a kind of medicinal wine), and some witchcraft ......

Of course, there is also the famous "cure-all" - bloodletting therapy, as to whether it can get better or not, it is God's will. -Bloodletting, and it's God's will whether it gets better or not.

PS, opium was actually a popular drug until the 19th century, and the British were very superstitious about it.

Overall, medical care in Europe was inferior to China until the 19th century.