I've found the remains of a doomsday-cult mass suicide. Can I do anything with their Poisoned Wine?

Solution 1:

Unfortunately according to the Fallout Wiki it says:

Despite the name, the only adverse affects of drinking it is a penalty to Intelligence.

Reference:

http://fallout.wikia.com/wiki/Poisoned_wine

Now, I personally haven't tried this myself, but you could potentially use this in conjunction with the Junk Jet. Who said launching poison wine followed by a teddy bear can't be fun? Even though the wiki says:

All ammunition has the same damage, as even soft teddy bears do the same damage as items that would normally have deadly effects, like deathclaw hands.

I wouldn't see why you couldn't at least make some use out of it other than losing a bit of intelligence!