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analgesic; painkiller; sedative; tranquilizer; tranquiliser
痛むので鎮痛剤を飲んだ。
It hurt, so I took a painkiller.
抜歯後、医師は患者に鎮痛剤を処方した。
After the tooth extraction, the doctor prescribed a painkiller to the patient.
鎮痛剤が効き、痛みが和らいだ。
The painkiller took effect, and the pain subsided.