Hay guys is out of date Tamoxifen still good to use??
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.