sup·pres·sant
noun/səˈpresnt/
/səˈpresnt/
- a drug that is used to prevent one of the body’s functions from working normally
（对人体功能的）抑制药，抑制剂 - an appetite suppressant
食欲抑制药
Oxford Collocations DictionarySuppressant is used after these nouns:- cough
- an appetite suppressant