Length of effectiveness once PZI is opened

Gem

Member Since 2020
Just curious how long I can use PZI once it has been opened. My cats BS have seemed to increase (from a stable 200-250 PS to now 300-350) I'm wondering if I need a new vial. I opened it about 7 months ago and it has an expiration of 4/21.
Thanks.
 
Just curious how long I can use PZI once it has been opened. My cats BS have seemed to increase (from a stable 200-250 PS to now 300-350) I'm wondering if I need a new vial. I opened it about 7 months ago and it has an expiration of 4/21.
Thanks.
ProZinc is good for 5-6 months after opened as long as you keep it refrigerated. If youre noticing it's not as effective I would get a new vial.
 
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