I assume your taking the Risperidone for pstd, which is an antiphyscotic with a long list of receptor sites it acts on and something I wouldn't take unless I had some terrible acute psychotic reactions all the time. Its a drug that plays with a lot of brain chemistry. I would consider both those drugs zombie drugs... because they dull you up pretty good. Speaking from long ago.
Dr.'s seem to prescribe these to a lot for a whole slew of reasons. I would not take either but I would not start the Risperidone. If you could give some more details on what these are for that would be helpful or pm if you want. But I tell yah' what Risperidone dried me up(nasally, mouth,GI) and slowed me down(mentally,personality) while increasing the frequency and scale of my tremors(associated with epilepsy.) while I took it.
Receptor sites affected from the Risperidone 5-HT1A, 5-HT1D, 5-HTA2, 5-HT2C, 5-HT7, D1, D2, A1,A2,
Pot CB1, CB2, Alot of sites indeed...