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Dear Dr. Roach: My brother had four mini-strokes in five days. They can鈥檛 find what caused it. He was in a university hospital for seven days. M.L.

Dear Dr. Roach: As a preventive measure for prediabetes, my doctor recommended I take 500 mg of metformin twice a day (morning and evening). I have been following this regimen for two months.

Dear Dr. Roach: I moved to the Northern California mountains about 17 years ago. There was much discussion about Lyme disease at that time. My husband and I decided, since we were surrounded by tick-carrying deer, that we should take all precautions.

Dear Dr. Roach: My 18-year-old daughter at college has severe acne that has not improved with OTC or prescribed topical treatments.

Here鈥檚 a possible Trivial Pursuit question: 鈥淲hat鈥檚 the fastest growing unpaid profession in North America?鈥� I admit I wouldn鈥檛 have known the answer. But according to the Family Caregiver Alliance, more than 65.

Dear Dr. Roach: I am looking forward to having my 90-year-old father-in-law come to live with us later this year, but we have a difference of opinion about his diet.

Dear Dr. Roach: My doctor has had me on gemfibrozil, simvastatin and metoprolol for more than five years. My pharmacist called the other day saying new studies say gemfibrozil and simvastatin should not be taken together.

Dear Dr. Roach: As we all know, a good night鈥檚 rest is very important to overall health. In my case, if I can get through the night without my nose getting congested or plugged up, everything is fine.

Dear Dr. Roach: I had a splenectomy in 2012 because an oncologist thought I had NK lymphoma. After pathology, I was informed that I had an unusual immune system with a lot of NK cells, but no cancer.

Dear Dr. Roach: I don鈥檛 have celiac disease, but I keep reading that gluten-free is a healthier way to eat. Is that true? Is there any risk? H.C .