Carbon is not healthy along with other things burning or smoking will create it also makes you cough like crazy. Vaporizer won't make you cough unless set to high temp & taking massive hits. Your friend prob had a crappy pen vape with glass screen to keep plant off the exposed coil they suck hardly produce any vape. read more
Whether a vaporizer pen gets you high depens on what kind of style you buy and what kind of e-liauid or herbs you choose. If you buy the qualitive vaporizer with heavy tobacco flavor, you can get high. read more