How long does quinine tincture or decoction stay potent?!


Question:

How long does quinine tincture or decoction stay potent?

I was wondering, after creating a decoction or tincture of cinchona bark so that it can contain quinine, how long does that mixture keep its effectiveness (potency)?

Also, do you know how long the bark, or bark powder, retains its potency?


Answers:

Three months.


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