antinauseant
noun
an·ti·nau·se·ant ˌan-tē-ˈnȯ-zē-ənt 
-sē-ənt;
-ˈnȯ-zhənt,
-shənt;
ˌan-tī-
variants or anti-nauseant
: a drug that prevents or counteracts nausea
The most-cited benefits of medicinal marijuana are as an anti-nauseant for cancer chemotherapy and to treat nausea and appetite loss in HIV/AIDS. 
The Sheboygan (Wisconsin) Press
The Sheboygan (Wisconsin) Press antinauseant adjective
or anti-nauseant
a drug with antinauseant properties
Word History
First Known Use
1855, in the meaning defined above
Medical Definition
antinauseant
noun
an·ti·nau·se·ant
variants or anti-nauseant
-ˈnȯ-zē-ənt, -zhē-, -sē-, -shē-
: a drug that prevents or counteracts nausea : an anti-nausea agent