The zambon inj winny didn't hurt me one bit.also test suspension in water is painless .it all depends where you get it from.
I have sydgroup test suspension that's in water from awhile ago,I took a huge hit because no matter what I do it gets clogged in syringe even with a bigger needle .
It sucks cause it came in 20ml bottles and I have like 10 of them sitting around for awhile.there still shrink wrapped,lol.
The potency is still there even though they expired cause how they were stored but just not worth the effort.