Dear Sue: My husband has not had experience with the sedative Altivan- but he did have an episode much like your dad's while he was on Eldepryl. He had been on Sinimet about 6 yr. and we read the news of what Eldepryl was supposed to do and pressed our neuro. for a prescription. About 6 weeks later we were travelling in our mobile home and Judd became totally disoriented, paranoid, and began talking about being an FBI agent and was going to make a huge deposit to our bank, etc.... It was rather scary for me at the time, though he never did anything too dangerous, but he did want to leave and "go places". Needless to say, we immediately dis- continued the Eldepry and he has never had such a severe break with reality since. There have been some other mild hallucinations but we know that the Eldepryl was causing some severe mental changes and were not willing to continue with it for the alleged benefits ( we never found them and I haven't heard anyone attest to knowing that Eldepryl really does extend or help the Sinimet, as claimed). I can only caution you about what is happening in your case , but perhaps you may want to investigate the situation further - keeping in mind that adding sedatives and additonal meds may add additional side effects of other kinds even. My husband and I still travel over 200 miles to make appts. and any travel is stressful anymore but we feel like he can handle it best with as clear a mind as possible. Just some thoughts you might want to consider as you work to help your dad maintain as enjoyable a life as possible.... My thoughts, prayers are with you..... Marie Care-partner husband 69/l2