A quick poison with obvious effects

So I have a scene where someone gets poisoned. I want the poison to have a couple qualities:

1. It works fast, with in the span of a meal be to exact

2. It can be put in food or drink, either covered up or without a taste or smell

3. It has noticeable effects that people would assume is poison and not say an illness, i.e. choking or foaming out the mouth or something like that, leading up to death.

4. It's easy to get a hold of.

5. Preferably, but not as important, it should be available/has been invented/discovered by 1920

I'm already aware of cyanide, which works for most of this, but I'm looking for other possible options so I'm not constrained to one thing. So does anyone know any poisons that fit this description?

posted over 5 years ago

snowfire1224‭

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