With graqes and certain other ingredients you can make wine. This wine would take longer and would require more ingredients to make. However, the end product would be very rewarding in either effects or price. You could "store" the wine in a cellar and ever day/week/month of game days it would go up in value or increased duration and magnitude of the effects. Now sell or drink! Could be the first real job!
Ollix gave this suggestion. Using this the alchemy skill would be much more useful to people with lower gold or those who don't typically use poisons or potions.
Shades gave this idea. I really like the idea of this. Wine could be one of your fort's/city's/town's exports.
Alchemize me some wine spiked with Moon Sugar, distribute to masses for cheap, kill a bunch from Moon Sugar poisoning, become Uncle Sweetshare, get arrested by some guards....
Just awesome.
The Master thief gave this idea. Could be a quest line with wine and other fermented drinks playing a major role. Or possibly a evil way of making money.
This extends upon the wine making.