Mucinex DM - are hallucinations are side effect?

Oh yes! The D stuff in cough syrup, Mucinex, and some other things for respiratory illnesses definately causes hallucinations. I thought that I was having a stroke. I had 3 of them in one night. I just couldn't quit coughing. I went in to my doctor that gave me cough syrup with a little bit of codeine. It was like half of my brain was like a Pac Man video game. I became aware of my dogs, that I could move my arm and hand and pet the dogs. Then I knew that I wasn't going crazy. I went in to the doctor and described this, and she told me that I was having hallucinations caused by the D stuff. I don't have any of this product in my house, and I can't remember the name or spell it. Your mother is probably also taking cough syrup, a cold or flu remedy-even something for allergies with the D stuff in it. Get her into a doctor, so she can get something to give her relief. What helps me is tea mixed with honey and fresh lemon juice. Hot steamy baths help loosen mucous.

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Vicks rubbed on the chest helps a lot. My son uses a vaporizer with Vicks in it to help loosen his mucous and keep from having bronchitis. Also another way to attack this is to use a breathing thing for people with COPD. These are all good things for the West and the desert. Even in damp places a Vicks rub on the back can do wonders in helping a person to breathe and sleep well. As a child on the coast, my brother had horrible attacks when the fog banks came in. He snapped out of it with the Vicks rubbed on his chest and a vaporizer. He ended up being a barrel-chested Marine.
Let me know how this goes. I know that a child can't always be close to care for an elderly parent, as a parent can care for a child that lives in the same home. Good luck-