My wife is having serious hallucinations?

There are no interactions between the medications, so that is discarded as being the possible cause of her hallucinations.

https://www.drugs.com/interactions-check.php?drug_list=148-0,2027-0

Ropinirole may cause serious side effects. Call your doctor at once if you have:

extreme drowsiness, falling asleep suddenly (even after feeling alert);

worsening or no improvement in your symptoms;

a light-headed feeling, like you might pass out;

unusual changes in mood or behavior;

tremors, twitching uncontrollable muscle movements; or

"hallucinations (seeing or hearing things that are not real)."

Source: https://www.drugs.com/mtm/ropinirole.html

https://www.drugs.com/amantadine.html

As you can read it is the increased dose of Ropinirole, you, as it says, must contact her Dr. asap.

All the best and I wish your wife a prompt recovery, masso