Well, I did so. Sniffing a marker pen will help stop that mucus oozing out from your nose every few seconds. Not sure how it does it; but being able to supress the mucus production from the nose glands and sinuses; thats enough and I am happy!
Of course, I made sure that the permanent marker is non-toxic and xylene-free; be safe!
Xylene when inhaled can seriously affect the central nervous system, increase liver enzymes, and irritate eyes/nose/throat. Other effects of Xylene exposure can include: headaches, light headedness, loss of co-ordination and loss of consciousness. So sniff responsibly to your own body :-)
Sniffing inhalants that can get you high may lead to substance abuse.