Length of effectiveness once PZI is opened

Discussion in 'Prozinc / PZI' started by Gem, Mar 27, 2021.

  1. Gem

    Gem New Member

    Aug 1, 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.
  2. JanetNJ

    JanetNJ Well-Known Member

    Jun 8, 2016
    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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