Not sure you can: Novacaine does hurt for a second or two if it is injected. Laughing gas does not. The missing piece here is why does he need to be convinced? Homeopathic argentum nitricum can really help with anxiety- especially doctor phobia or needle phobia in case he needs to have some procedure done.
Answered 12/1/2013
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3 doctors weighed in across 2 answers
3 doctors weighed in across 2 answers
7 doctors weighed in across 3 answers
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