吐剤 is read as とざい (tozai) and means emetic.
とざい
tozai
はきげ
nausea
はきだす
to vomit
つく
to breathe out
はく
to confess
とろ
expressing one's mind
とすいぐち
spout (for water)
はきけをもよおす
to feel nauseated
としゅつ
vomit
はきくだし
vomit and diarrhea or excreta (diarrhoea)
はきけがする
to feel nauseous
かくせいざい
stimulant (e.g. psychoactive drugs like methamphetamine, ritalin, etc.)
せんざい
detergent