Is my trimix still good after thawing?

[bldoink]

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[Young-at-heart]

My pharmacy gives it 6 months as an "expiry Date". I've gone beyond by a month with no noticeable impact. I thaw it, take a dose and refreeze it many time in between.

[Martin6469]

Expiration dates of a few months are fictitious. I never freeze Trimix - I've used Trimix refrigerated at 40F (4C) for 10 months with no change in effectiveness.

[qcswral]

My pharmacy gives it 6 months as an "expiry Date". I've gone beyond by a month with no noticeable impact. I thaw it, take a dose and refreeze it many time in between.

This is my routine as well...I keep it frozen and thaw it to make up about 10 syringes.. I re-freeze the Quad-Mix vial and the syringes I won't be using that day. Haven't had or noticed a problem....I have had some Trimix batches that after 6 months the efficacy seemed to drop off...but I've also had batches that seemed to do the trick after 1 year. I sometimes think that happens due to several factors out of my control from the compound pharmacy...For example; potency of the 3 medications (or 4 for Quad-mix) as well as the age of their medications on hand that they use to create the Trimix/Quad-mix formula.

[CanGetItUpButNotOff]

I've only used one batch of Tri-Mix since it was initially prescribed for me 9 months ago. My routine is to freeze it, and then thaw it for about 10 syringes worth, then refreeze it. I recently traveled for about a month with it so it has gone through a thaw cycle during that travel time that may test whether or not it's still efficacious.