Hay guys is out of date Tamoxifen still good to use??
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Yea it's still fine. Expiration date for pharmaceuticals is at the point called the t90. That's the time at which 90% of the original compound is guaranteed to still be active and 10% has become inactive. Shelf life for tamoxifen citrate is around 5 years. Yours is just a few months past the exp date, so you're still right around 90% potency.
In other words, it's still good. Dose as you normally would. No worries.