Risperidone, an atypical anti-psychotic, essentially functions as a cross between an anti-psychedelic and an anti-speed, which means that it generally decreases levels of serotonin, norepinepherine, and dopamine in the brain. Ecstasy, usually meaning MDMA, is a cross between a psychedelic and a stimulant, increasing levels of the aforementioned three neurotransmitters. It will take a lot more of any stimulant or psychedelic, therefore a lot more MDMA or MDx(x) chemicals (which have properties of both) to inebriate you than if you hadn't been taking the Risperidone.
The drug has a half life of 3-20 hours (depending on metabolism) but you can bet that a steady concentration is maintained in anyone's bloodstream if they've been taking it for a few weeks, which I assume you have, so it will only minimally make a difference if you skip your dose.
The dose you are taking is approximately 16 times the lowest therapeutic dose given, and four times the maximum amount usually given to people with bi-polar disorder, which suggests to me that you have been diagnosed with schizophrenia.
On a personal level, I would strongly advise against taking any ecstasy while on Risperidone as not only are you not sure that what you are taking is indeed MDMA, but the dose you're taking suggests you have a serious psychiatric problem that stimulants and psychedelics are extremely likely to make worse. In other words, taking a stimulant or psychedelic is perhaps the worst thing you can do for your brain if you have any sort of psychotic disorder. I know from experience.
You are directly fighting your medication by taking ecstasy.
I know this is heavy.
I take 4mg Risperdone nightly and twas wondering if that could affect my ecstacy consumption although I do not take them anywhere near the same times...often skipping my Rispersone on nights I take mother molly.... Thankies much for the help 
