[boxed]

It could be that you didn't get real homeopathic medicine. There's been quite a few cases of babies dying after being given "homeopathic" medicine. Because real homeopathic medicine is indeed quack science, literally diluting a substance to the degree of one molecule per a sphere of water the size of the entire solar system, but homeopathic producers are grossly immoral and stupid/bad and unregulated, so can contain high, in some cases deadly, doses of various substances.

TLDR:

Homeopathic medicine is, in theory, 100% safe, since it's literally nothing.

Homeopathic medicine is, in theory, 100% ineffective, since it's literally nothing.

Homeopathic medicine is, in practice, rolling the dice with unregulated producers that have been known to ship poisons.

[graemep]

I think this is the most probable explanation.

Homeopathic medicine is based on the same principles as sympathetic magic. You might as well ask someone to cast a spell.

https://pietersz.co.uk/2013/07/homeopathy-magic

There have been similar problems with dilution of herbal medicines, but of course herbs do often have medicinal properties.