Can someone have hallucinations on ecstasy?

Yes to hallucination. Ecstasy (mdma) can cause derealization, depersonalization, visual hallucinations, decreased appetite, dry mouth, tooth grinding & problems concentrating. After- affects include irritability, anxiety, paranoia, depressed mood, fatigue, diarrhea, constibation, apathy, vertigo, lightheadedness & insomnia. Stroke, coma, organ failure & death can also occur.
Yes. Any chemical that alters brain chemicals are capable of hallucinations.
Quite Possible. Ecstasy, also known as mdma, is a drug that is very popular with today's youth. It can induce a sense of euphoria, a sense of intimacy with others, and diminished anxiety. It can produce mild auditory and visual hallucinations. Unfortunately pills purchased off the street often contain other hallucinogenic agents such as lsd. After effects include depression, paranoia, and irritability.