Expiry of medication

[seudzar]

May I know how long do you guys keep the fish medication after you all open it for use. The medication that I have does not have any expiry date printed on it. Please advise.

[delhezi]

I believe a good number of products do not mention any expiry dates. You can try googling about the product, or perhaps for the shelf life of the primary component of the product.

[technotango]

As medications are essentially chemicals, I believe their medication effects remains as long as no interaction with external environment occurs. However, a good gauge would be not more than 3 years.