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Invega can cause muscle tension or tightness, increased tone or stiffness, even twisting movements and tremors. If this problem started within a couple weeks of starting this medicaiton, you should call the prescribing physician immediately and let them know you believe you are having an adverse reaction. They can advise you about what to do next. There are certainly other medications that can be used to treat BPD.
Does this make sense? It's important that you stop this medication if it is the cause of your symptoms, but you should check in with your doctors before doing so.