Welcome to HCM!
I have gone through your question and it says that your father is on nexito
forte and resperidone. you have not mentioned the dosage of any any of them. Nexito forte is safe in this age, except when thee is severe liver
dysfunction, it has least interaction with other medicines, but, may cause reduction in soduim levels , espically in old age. This happens more when there is already existing liver or kidney
problems. One needs to get sodium and other electrolytes checked to see if that is causing disorientation/ other deteriorating symptoms . You should have mentioned the deteriorating symptoms, this would rally have helped in telling the possible cause...
Resperidone is also usually safe in low dose, and actually an effective medicine. In some patients it may cause disorientation, delirium
, and rigidity ( tightening of limbs
), increase in salivation and slurring of speech...
So, whatever it is, please talk to his doctor, after evaluation and looking at the patient one can tell what is happening.
I know it is troublesome, but sometimes even the right medicine may cause distress in few patients. These drugs are for psychiatric problems. His doctor may go for some other safe and low potency medicine or education the dosage of these only.
I hope your father gets well soon
Feel free to ask more questions
Dr. Manisha Gopal