alleviant
/ˌæl.ɪˈvɪ.ənt/Definitions
1. adjective
tending to alleviate or relieve; providing relief
“The new pain-relieving medication was considered an alleviant for the patient’s chronic condition.”
2. noun
something that alleviates or relieves a difficulty, problem, or condition
“The doctor prescribed an alleviant for her patient’s anxiety.”