Remarkably, very little is known definitively about DXM or its long-term effects. When used as intended for cough suppression, typical dosages run about 10 to 20mg. When used recreationally, dosages are generally much higher, in the range of 250 to 1500 mg. Addiction Research Foundation, pp. Lower doses cause euphoria, stupor, excitability and changes in muscle reflexes, Large doses in the range of 250 to 1500 mg are known to cause euphoric and hallucinatory effects.
Proper dosages are, however, very specific to the person taking the drug.
Generally, the more serious side effects are a result of combining DXM with alcohol and other drugs. As has been noted, little is known about DXM with respect to long-term use and addiction. DXM is thought to be a moderately habit-forming substance with no physical addiction. It should be noted, though, that virtually any substance can be addictive, to a greater or lesser degree, depending on the user. It is a generally accepted notion among treatment professionals that the addiction, whether physical or psychological, is the problem, not the specific substance.