Snorting methamphetamine may and often does irritate the nasal passages.
When GHB was available to the general public many false claims were made by drug companies involved, such as stating that it would help to build muscles, burn fat and improve a person's sex drive.
Long term abuse of alcohol has been found to damage the frontal lobes of the brain.
The most common method of administration of crystal meth is inhalation by smoking.