u will hallucinate so no its not safe. plus u will reach a new low in ur life. come on -u really wanna get high off cough medicine like a 14 year old?
DJ Screw died from it. And you don't get "high" off prescription cough syrup, you get "drunk". It's nothing like a marijuana high or something like that. It's more similar to being drunk. You can easily overdose though, on both prescription and non-prescription.
YES, it will make you intoxicated.
NO, it's not safe
The Guaifenesin is a decongestant it won't intoxicate you in any way. Dextromethorphan (DM) is the ingredient that will cause you to become light headed.
...But you shouldn't do it.