Day Tripper (perk)

 is a challenge perk in Fallout: New Vegas, granted after taking 25 addictive chems.

Effects
You've done enough chems to know how to hang on to the effects just a while longer. More specifically, ingested chems last 33% longer than they normally would.

This perk stacks with the Chemist perk, adding up to a chem duration of 2.33 times longer.

Behind the scenes

 * It is a reference to The Beatles' song of the same name.