Husband took one 0.5mg because he was full of anxiety, has Parkinson's and the pill almost put him totally out. Within minutes he was like jelly. Balance awful, ate ice cream so very slowly it melted, then he zonked. Could barely awaken him, seemed spaced out. I was and still am a bit scared, very concerned. Wanted to take him to hospital. He was coherent just enough to refuse. I will touch base with neurologist in morning.