But if that is not the case, I can tell you this, Risperdal is used mainly for the treatment of schizophrenia. I dont know exactly the reason in which you are taking both of these medications. But if you are schizophrenic, I wouldnt recommend taking Strattera unless of course the benefits overweigh the risks. Now, Risperdal is a powerful anti-psychotic, and works on two neurotransmitters in the brain (mostly dopamine but also serotonin) it does not work on the nuerotransmitters transporters that Strattera affects which are norepinephrines transporters
So I highly doubt taking both will kill you, however this can ultimately depend on the amount of each drug you are taking. If you are taking an appropriate dosage of each I wouldnt see this as anything life-threatening. But, Risperdal is also helpful for depression, so if that is why you’re taking Strattera I dont see a point. Basically it is up to you to decide if you want to continue taking both of these drugs, but I dont see it necces