You donīt smell better, probably worse after using it because it leaves this weird sensation like you inhaled a bunch of vicks nosesticks without the peppermint scent. The effect is like you had a cold and your nose is blocked and then suddenly its no longer blocked, but without the cold..it feels strange and unpleasant. You dont smell better.
When those effects wear off you donīt notice anything regarding your sense of smell, not that I recall anyway.
Also, if doctors use it they monitor patients very well I donīt recommend experimenting with highly addictive substances because it might help another hobby. And with not recommending it I actually think itīs bloody stupid to even consider it.