A drug user who reports "hearing" colors and "seeing" sounds has most likely used an LSD.
Lsd
Yes, depending on the dosage, LSD can cause physical, auditory, and visual hallucinations respectivly.
No. LSD is Lysergic acid Dethylamide. In it's pure laboratory form it's just what it is -- pure LSD. Street LSD is often cut with other drugs, most notably amphetamines and other stimulants. This happens when the stimulant is less pricey than the LSD, so less LSD can be used with similar effects, as stimulants tend to "enhance" the trip. Codeine is a completely unrelated medication that has no perceived interaction with LSD.
Somewhat. It is considered a psychedelic but the effects produced by MDMA(Ecstacy) are quite different from your usual LSD or 'shrooms'. MDMA is considered a stimulant/psychedelic.
Substances that are not stimulants include depressants (such as alcohol and benzodiazepines) and hallucinogens (such as LSD and psilocybin). These substances work on the central nervous system in different ways compared to stimulants.
Cocaine is a stimulant. Heroin is an opioid narcotic and painkiller. Marijuana does a little bit of everything, but it is classified as a hallucinogen even though most who use it do not hallucinate.
LSD
The chemical in LSD is LSD. LSD-25 is the chemical. It stands forLysergic acid diethylamide
It's both a stimulant and a hallucinogen.
I don't see how this combination would have any negative physiological effects, since the interactions between them would be minimal. However, taking Marijuana with LSD can lead to an increased likelihood of having a "Bad trip", since both of these drugs are known for increasing paranoia in many individuals. The morphine and marijuana would likely have a depressant effect which would likely lower the intensity of LSD's stimulant effect.
No, LSD is not a barbiturate.
LSD is a hallucinogenic drug.