Can poison have an expiry date?

I got this question from a twitter post. How can it be? For everything we have an expiry date. Then what about poison? What can happen if someone (or animals) consume poison after its expiry date? What's your view?

Note: Humour replies also expected.

Written by Category: General Reference 4 years ago
Sandhya Rani

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When we speak about expiry dates for medication it is because they turn poisonous and when it is a case of expiry date for poison , it can only turn even more poisonous after expiry date..

usha manohar
Sandhya Rani I also go with this option (except for natural poisons made from less harmful things) - Sandhya Rani - 4 years ago

do we really manufacture poison???? 


Well I never thought of it. Really interesting. I know that medicine turns poisonous or harmful after expiry date. But poison?? Does it become more poisonous or losses it's functioning?? 


On a lighter note. Suppose the vitality of poison is.lost after expiry date. A person who wants to end his/ her life consumes it and is still alive...So we can say ..unexpected Death comes anytime but a planned Death comes with expiry date. 

Arunima Singh

Poison is poison. No difference of expiry date. Before expiry and after expiry it is dangerous for us.


I think no... The poison remain poison. No matter it is expired or not..



That depends on what the poison is and how it is stored. Many organic poisons like most common insecticides and herbicides  break down over time and lose their toxicity  and they become less poisonous, meaning you need a bigger dose. but you have to wait years after the expiration before it stopped working altogether.

Some organic poisons have an expiry date for exactly the opposite reason. They break down , but they break down in more poisonous substances.

Hence, the answer is, it can become less poisonous or become more poisonous, but poison is always poison.


I think No, because it will have some effect, may be less. Some medicines even after expiry date have their effects, then why not poison.

Manoj Kumar Lamba

It will of course depend on its composition and storage conditions, but poisons are chemicals - both organic as well as inorganic and they will break down into other compounds, some may be poisonous, some non poisonous.

The only way to determine will be to take a dose of such expired poison yourself and you will find out then :)

Kalyani Nandurkar
Sandhya Rani hahaha - Sandhya Rani - 4 years ago

this is a really good question and worth thinking.. I think it will have an expiry date. After the expiry date may be the chemicals in the poison won't work as effective as it should hv or would work before the expiry date..




I think after the expiry date, the poison expires and it becomes like any other normal liquid like water or milk, though it has to be tested by R&D and confirmed.


For drug products terms are like

Shelf life and expiry date.

In theory the difference between those two is subtle:

A drug that has passed its shelf life might still be safe for consumption, but its quality is no longer guaranteed. For a the drug that is passed its expiry date producers cannot guarantee the full potency and safety of a drug.

Nidhi Rajput

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