cant say i have. there are a lot of side effects when taken regularly.
from wiki:
A formal survey of dextromethorphan users[17] showed that more than half of users reported experience of the following symptoms individually for the first week after dextromethorphan use: fatigue, apathy, flashbacks, and constipation. Over a quarter reported insomnia, nightmares, anhedonia, impaired memory, attention deficit and decreased libido. Rarer side effects included panic attacks, impaired learning, tremor, jaundice, urticaria (hives) and myalgia. Frequent and long-term usage at very high doses could possibly lead to toxic psychosis and other permanent psychological problems.[1]
Erectile dysfunction and diminished libido can be a longer-term effect (years to decades) of many narcotic analgesics due to development of central hypogonadism; this appears especially common in individuals with significant melanin deficiencies, as the hormones tied to melanin production affect the absorption and conversion of these analgesics into progesterone.[18] Additionally, the haplotypes of about 48% of the indigenous population of Great Britain aggravate the condition, as the E647 sequence underwent epigenetic degradation and became a pseudogene. The chance of vulnerability is doubled for males, as the critical sequence is located on the X chromosome.
