Ant Nectar

Ant nectar is a chem naturally produced by giant ants, it has an unmodified duration of four minutes.

Fallout 3
It is relatively rare since it is only found on few giant ants or in Ant Refuse Piles. A few can be found on the dead body of William Brandice in the Marigold Metro Station. It can also be found by going to Shalebridge and searching the large mound in the same room that you find the large ant egg pile and the Ant Researcher, and checking the mound every few in game days.

Fallout: New Vegas
In Fallout: New Vegas, ant nectar is most commonly found on dead giant ants. If taken in excess, you can get addicted to it though the chance of addiction is very small. With Chem Resistant and Old World Gourmet the chance of addiction is only 1.25%, while employing a 33% longer duration if the player possesses Day Tripper as well. Taking 20 doses guarantees addiction, regardless of addiction chance.

Bugs

 * Ant nectar addiction used to be incurable due to a bug, but this was fixed in Fallout: New Vegas patch 1.2.0.31x. The console command will immediately remove the addiction on the PC version.