Before this question is answered a distinction must be made between ecstasy and ecstasy pills. Ecstasy is one of the many street names for the chemical MDMA (3,4-Methylenedioxymethamphetamine) where as ecstasy pills are tablets which are claimed to contain MDMA but may in fact contain any number of chemicals.
MDMA is NOT physically addictive. It is not addictive in the way that drugs such as alcohol, nicotine and heroine are addictive. Having said this, it has been considered to be mentally addictive for some people.
Ecstasy pills may contain any number of chemicals that are not MDMA and some of these may be addictive. The two most common addictive drugs that are found in ecstasy tablets are caffeine and amphetamines. Contrary to popular belief, Heroin and other opiates are rarely found in tables sold as ecstasy. In tests preformed by the EcstasyData.org, less then 0.1% of tablets tested contained any opiates.
In summary, MDMA (ecstasy) is NOT addictive. Ecstasy pills occasionally contain other drugs that are not MDMA and that may be addictive. The dose and method of consumption (oral) of ecstasy tablets do not often lead to physical addiction to these chemicals.
LSD is NOT addictive
No, it has zero addiction potential. The only property LSD has that qualifies it as addictive is an increasing tolerance. Caffeine is more addictive than LSD is.
If the question is what do i know about LSD then i guess that it is made of C20-H25-N3-O, it is taken as a liquid or tab. It is considered a hard drug and is not addictive but lasts along time when taken. LSD makes you see hallucinations of colours and other things.
LSD is not physically addictive. There are no physical withdrawal symptoms. It just wears off after awhile.
LSD, like most, if not all, hallucinogens dose not have any addictive potential.
LSD is no more addictive than Television. Lysergic acid Dilythimide (LSD) is the only content, originaly developed to treat cluster headaches (migrains) it is derived from the ergot that grows on the mold of the rye plant.
lsd
Meth, because it's highly addictive.
No, it is not addictive at all. Users usually know to limit usage after using. Im pretty sure its almost impossible to get addicted to lsd. It is not physically addictive, however it is possible to build a psychological dependency on it. However, in order to achieve similar effects it is necessary to increase doses massively and is inadvisable. It should be treated with great respect! LSD is an extremely potent and (in common with most hallucinogens) unpredictable drug.
LSD is not an addictive substance, so anyone may stop using it whenever they wish.
The addictive substance
Most of the time LSD is non-habit forming, there is no evidence of psychological addiction and if there were cases, it is very rare. Hallucinogens and tryptamines are very uncommon to induce a habit. Even then LSD is actually harmless.