me and my 2 other friends want to try DXM today and i dont know too much about so can someone please tell me a common substance that they would usually sell at a drug store with pure DXM and no other ingrediants to get all 3 of us trippin
Just look on the bottle. Look for something that says only "Dextromethorphan" under active ingredients.
As far as dosage goes, 300mg a piece is a good start. I should advise you to take a small (~50mg) dose first to test for any enzyme deficiency, but its really really rare.
The B&D thread has been mentioned, also check out the Erowid dxm vault.