Ive not heard of a sustained release risperidone prior to this, but in theory, given the nature of antipsychotics and this method of release, one would assume the experience would be slightly muted at best; if any at all.
Especially if youve been taking it longer than a few months. In no way to mean this personally, but if an underlying psychological disorder warrented the use (or need) of a stable release of an antipsychotic, then ingesting psychedelic substances would generally be contradicted in achieving remission of said disorder. (Living in the real world, of course I totally understand wanting to partake!)
Consequently, stopping the medication for a month may provoke symptoms that were present prior to treatment to return. Also unsure if there would be any uncomfortable discontinuation syndrome involved
Again not particularly referring to you OP, but rather viewing the given scenario objectively in terms of harm reduction for other readers as well.