Hello computer_collector, Welcome to Psychedelic Drugs. Have you taken a few moments to read our forum guidelines? If not, please do so.
Sleep deprivation isn't a drug at all, so I'm not entirely sure this post belongs here, but I'm going to leave it open for now.
No more flaming you guys. That ALSO is a guideline, and I expect you to stick to it.
The erowid site is a great one, I suggest you spend a long time reading there before you make any decisions about trying drugs of any type. Read their FAQs, and especially read their trip reports (both the good ones and bad ones).
The FAQ forum on Bluelight is also a GREAT place to get information, and I'd reccomend reading several of those, and also digging around in the psychedelic drugs archive.
You've been asking a lot of questions about Robotussin, please read
The DXM FAQ. It will answer a lot of your questions and also give you a lot of important safety info.
There is a wealth of information about these drugs on the internet.
In response to your original question, let me tell you that I do not think you understand the nature of psychedelic hallucinations. Acid and shrooms DO produce visuals, but its more like watching the world around you warped with colors and melting, etc. You won't see little green men or anything like that, at the most familiar things may take on the characteristics of something alien like that.
Sleep deprivation on the other hand, produces delusions. These are the horror stories you hear about. Where the dog talks to you and the little green men jump out of the shadows to get you.
And DXM(the active drug in Robotussin) is more like being in a waking dream.
I do not know what exactly you are after, but the most profound effects of ALL of these ways of altering consciousness take place not in front of your eyes but in your own mind. The way you perceive the world around you, and process your thoughts, language and emotions will change. There are advantages and disadvantages to this, and I do not think that words can ever completely convey to someone who is uninitiated as to what it is like.
There are certainly risks involved in the use of any drug, and I'm glad to see your concerned about those. But if you are truly curious, do not let your concerns deter you. Read, research, think and plan ahead.
Pure