From Longman Dictionary of Contemporary Englishpurgativepur‧ga‧tive /ˈpɜːɡətɪv $ ˈpɜːr-/ noun [countable] old-fashioned MDa substance that makes your bowels empty
Examples from the Corpus
purgative• It was colossal and magnificent-a purgative of national despair.• Throughout Britain, thousands of teenagers, offered a rude purgative to royal overkill, chorused a noisy amen. 