The best replacement for nitrous oxide is nitric oxide.

The best alternatives to nitrous oxide are rated as following:

★★★★★	nitric oxide
★★★	nitrogen oxide
★★	iv sedation
★★	carbon dioxide
★	laughing gas
★	novacaine
★	sedation
★	local anesthesia
★	novocaine
★	nitromethane
★	general anesthesia
★	supercharger
★	oral sedation
	conscious sedation
	nitrogen dioxide
	helium
	liquid nitrogen

Your alternative for nitrous oxide is not listed? Suggest!

Speaking about nitrous oxide, one probably shouldn't forget about dental procedures.

Other search terms related to nitrous oxide and their ratings are:

★★★★★	dental procedures
★	dental work
★	sedation
	general anesthesia

You have in mind a companion for nitrous oxide and it is not yet here? Propose!

Google Trends

Scale is based on the average worldwide traffic of nitrous oxide in all years. Click on graph for more.

nitrous oxide

nitric oxide

nitrogen oxide