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Dear Dr. Roach: I鈥檝e suffered from essential tremor for 16 years. I take 500 mg of primidone and 40 mg of propranolol twice daily. I鈥檝e gradually increased the dose over the years, and the combination works quite well.

Dear Dr. Roach: Do home colon-cancer testing kits really help in the diagnosis of colon cancer? Do you recommend them? E.F. I strongly recommend colon-cancer screening for healthy people between the ages of 50 and 70.

Dear Dr. Roach: I recently had a hip replacement. I聽am 84, with hearing loss. My family says my hearing is worse after the operation. My daughter talked with several seniors who experienced the same thing. They think it has to do with the anesthesia.

Dear Dr. Roach: In a recent article, you spoke of small red blood cells. I have large ones. My MCV is 102, with no anemia. What causes this besides alcohol, and is it something to be concerned about? I do not abuse alcohol. Thank you. C.P.

Dear Dr. Roach: In a recent column regarding concussion, you made a statement that 鈥測ou should remember that treatment is almost always better sooner than later.鈥� That raises some concern for me with my present situation.

Dear Dr. Roach: I was wondering what adult vaccines should be given to enhance the immune system, in addition to improving sleep and diet. P.P.

Dear Dr. Roach: My husband will be 82 in July. About three years ago, I became aware of his sudden movements during the night. We were renting in Florida, and the bed was smaller than our bed at home. His body would jerk, sometimes strongly.

Dear Dr. Roach: The senior centre in my community is kept at a temperature that I and many other seniors find too cool for our comfort. After two hours of playing Scrabble or watching a film, we feel chilled to the bone.

Dear Dr. Roach: I just read your column about anxiety and sleep disturbance. I take issue with your advice to go back to the primary doctor.

Dear Dr. Roach: Our local newspaper just ran the obituary of a 59-year-old woman who died from Alzheimer鈥檚 disease. I didn鈥檛 know her, but I鈥檝e known at least two other people with that illness.