Can Taking Sizodon Forte And Zypsydon Induce Sleep Talking?

My wife is treated for schizoprenia and taking sizodon forte and zypsydon 40 in the morning and 80 mg in the night. She is better though not completely cured( She has got the problem of audio halluination. Recently for sometime I find her talking irrelevantly in the night during sleep. It continues for a long time? Is there any connection between the medicine she takes and sleep talking? What shall I do to stop slEep talking. She is now 70 years and takingmedicines for over 8years- ( starting from low dosage os sizodon 1mg