Hangovers were an unpleasant effect which temporarily debilitated people. Humans and Time Lords could both develop them.
The Doctor once picked up a hangover cure on the planet Zanthas IV. (AUDIO: Catch-1782 [+]Alison Lawson, Main Range (Big Finish Productions, 2005).)
When Graham O'Brien disputed the Thirteenth Doctor's claim that Pythagoras wore shades, she replied that he had obviously never saw Pythagoras with a hangover. (TV: The Ghost Monument [+]Chris Chibnall, Doctor Who series 11 (BBC One, 2018).)
After getting knocked out by the Morax Queen, the Thirteenth Doctor said that she had not had a hangover so strong since the Milk Wars of Keston Five. (TV: The Witchfinders [+]Joy Wilkinson, Doctor Who series 11 (BBC One, 2018).)
On the phone, Jackie Tyler asked her daughter Rose if she had a hangover when she asked her what day it was. Unbeknownst to Jackie, Rose was calling her from the year 5,000,000,000. (TV: The End of the World [+]Russell T Davies, Doctor Who series 1 (BBC One, 2005).)
Donna Noble twice missed alien attacks due to hangovers: she slept through the 2005 Auton invasion because of a severe hangover, before which she had made a "disgraceful" ham in parsley sauce for her mother's birthday tea. (PROSE: Rose [+]Russell T Davies, adapted from Rose (Russell T Davies), Target novelisations (Target Books, 2018).) On 25 December 2006, she had "a bit of a hangover" and thus did not notice the Sycorax spaceship above London. (TV: The Christmas Invasion [+]Russell T Davies, Doctor Who Christmas special (BBC One, 2005).)
In only his second week working for Torchwood Cardiff, Owen Harper was hungover and unreachable, forcing Toshiko Sato to pretend to be a medic and examine a "space pig". (TV: Exit Wounds [+]Chris Chibnall, Torchwood series 2 (BBC Two, 2008).)
Lisa Hallett recalled to Ianto Jones that the last time he said he did not love her for what she looked like was when they were hungover on a Saturday. (TV: Cyberwoman [+]Chris Chibnall, Torchwood series 1 (BBC Three, 2006).)
While investigating the ATMOS factory with UNIT, Donna was surprised that, as the sick day folder was blank, nobody who worked at that factory had had a hangover. (TV: The Sontaran Stratagem [+]Helen Raynor, Doctor Who series 4 (BBC One, 2008).)
On 1 January 2019, Lin complained that everyone was hungover on New Year's Day. (TV: Resolution [+]Chris Chibnall, Doctor Who New Year Special 2019 (BBC One, 2019).)
On 13 October 2021, Mark Mathias had a hangover after celebrating Hex's birthday the previous night. (AUDIO: The Harvest [+]Dan Abnett, Main Range (Big Finish Productions, 2004).)