Nitrous oxide and ether.
D000698:Analgesia; D000758:Anesthesia; D000760:Anesthesia and Analgesia; D004986:Ether; D004987:Ethers; D006801:Humans; D009609:Nitrous Oxide; D059408:Pain Management
D004987:Ethers; D004986:Ether; D009609:Nitrous Oxide
ETHER, ETHYL/anesthesia and analgesia; NITROUS OXIDE/anesthesia and analgesia