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From:[log in to unmask] (Jo=E3o Roberto D. Azevedo) Subject: HALLUCINATION X PARKINSON Hallucination is not a PD symptom. The principal cause of hallucination (= =20 mainly visual hallucination ) is drug intoxication and the classic example= =20 is alcohol intoxication. Some drugs used regularly on medicine can cause=20 hallucination and the symptom goes away when stop the drug. The first thing= =20 to do when we are in front of hallucination is to study with care each dru= g=20 on use to stop the correct one.I saw many times, hallucination appear later= =20 on the PD treatment with levodopa and vanish with the withdrawl of the=20 levodopa, or sometimes just lessing the drug dose. We must understand that PD patient often receive many diferent drugs (for= =20 hipertention, diabetes, pain, etc) and eventualy they can interact. The las= t=20 thing to do when in front of hallucination is to add another drug. jrobert.