Medication packets life expectancy once opened?

[chicknerd]

Hi

A few questions I have not been able to find answers to:

1. I bought some Corid for Cocci a few months back. I put the bag in a zip lock bag. Is it still good? Should I have refrigerated it?

I need some now for the next batch of chicks (I apparently have a lot of cocci in my grass as each group has got it once then go outside).

2. In general when you buy those giant packets of medication, you dont use the whole thing. Is is ok to keep? For how long and how (ie refrigerated or not or does it matter?)?

Thanks

 

[RedRoosterFarm]

I get liquid but here is a bump! I would think a bag would be fine but you want it dry so it does not get damp and ball up.