Potency of old antipsychotics

[obliviousatbest]

I have a stash of Quetiapine (Seroquel) I was prescribed nearly 10 years ago and goddamn was it the strongest sleeping pill I've ever known. Literally knocked me out for 12 hours when I first took it while sectioned in hospital, before I started tonguing them hence the stash. Does anyone know if antipsychotics retain their potency over years? Was considering taking some before an OD to completely knock myself out and reduce the SI that inhibited my previous attempts

 

[LittleJem]

I don't know, but there would be no harm in testing one to sleep one night. Then you would know if they still work?

I've got a box of them but never took em.