Grimm Sickfic: So a Grimm and a Blutbad Walk into a Bar by himitsutsubasa

Title: So a Grimm and a Blutbad Walk into a Bar
Author: himitsutsubasa
Gender Getting Sick: Male
Character Relationship: Friends
Link: https://www.fanfiction.net/s/7892891/1/So-a-Grimm-and-a-Blutbad-Walk-into-a-Bar

Monroe takes cares of a drunk Nick in this sickfic. Some vomiting in Chapters 2 and 3.

Grimm Sickfic: Bouts of Illness by Cumberbatch Critter

Title: Bouts of Illness
Author: Cumberbatch Critter
Gender Getting Sick: Male
Character Relationship: Friends
Link: https://www.fanfiction.net/s/8088220/1/Bouts-of-Illness

Short descriptions of Monroe and Nick getting sick different times with a few very brief mentions of vomiting.

Grimm Sickfic: Happily Ever Afters for the Modern Age by badwolf36

Title: Happily Ever Afters for the Modern Age
Author: badwolf36
Gender Getting Sick: Male
Character Relationship: Friends
Link: http://badwolf36.livejournal.com/51563.html

Monroe and Rosalee take care of an injured Nick when he intrudes on their date in this Grimm fanfic. At one point, Nick ends up vomiting.