But for a water-containing oral suspension we compound in-house, what’s the standard beyond-use date per USP <795>? I was taught 14 days refrigerated on the label, but I’m curious if anyone adjusts that when specific flavoring syrups are used to maintain dispensing accuracy and stability?
Sticking with 14 days refrigerated per USP <795>; flavoring syrups don’t extend BUD by themselves. “curious if anyone adjusts that when specific flavoring syrups are used” — we only do when there’s published, formulation-specific stability (e.g., API in SyrSpend or Ora-Sweet) showing longer, otherwise keep 14 days and cold. Which syrup/API are you working with?
, I only push past the two weeks cold when there’s stability data for that exact API-in-vehicle combo (e.g., Ora-Plus/Ora-Sweet) or a monograph backs it — otherwise <795> ties our hands. The sweet vehicles don’t buy time by themselves; I’ll instead do a quick redispersion check after 24–48 hours to make sure dosing stays consistent with the thicker stuff. @swalsh67, do you have any published data for your drug in that specific base, or just anecdotal performance?
If the syrup shifts pH or dilutes preservative, I tighten the two-week fridge label, @mpatel16. Quick check: log pH at day 0 and day 7; >1-unit drift or thinning means don’t extend, and remember the flavor base’s ‘good for X months after opening’ isn’t your compound’s stability. What API and which base (SyrSpend SF vs simple syrup)?
But i’m with @hburns88 on the refrigerated default, but I shorten it when we use meat/fish flavors for dogs/cats — those bases bump bioburden and can undermine preservatives (no one wants a tuna suspension surprise). To protect dosing accuracy, I log redispersibility time (10 gentle inversions) on day 0 and mid-cycle; if it slows or cakes, I cut the date and change vehicles next batch. What flavor base are you using — commercial blend or house-made syrup?