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Dear Dr. Roach: Here’s something I've wondered about for a long time: Years ago, I was told that I lost five pints of blood in childbirth.

Dear Dr. Roach: I am an 84-year-old man in reasonably good health. I have taken blood pressure medicine for about 30 years. For the past six months, I have been taking trospium tablets to treat frequent urination.

Dear Dr. Roach: I am a 77-year-old man in reasonably good health. I am physically active and at normal weight.

Dear Dr. Roach: I have dealt with irritable bowel syndrome for more than 40 years. I have had less cramping and loose stools when I quit drinking milk. However, now over the past few years I have had mild constipation and very frequent bloating.

Dear Dr. Roach: I read that cow’s milk weakens the bones. Is that true? A.H. The preponderance of the evidence is that dairy intake — such as cow’s milk, yogurt and cheese — increases bone strength and reduces fracture risk.

Dear Dr. Roach: Is medical research shared? It seems that after all these years of battling various types of diseases and maladies, more progress should have been made than has been done.

Dear Dr. Roach: I just read an article that vaccinations are on the decline in many states. My question is about children who already have vaccinations.

Dear Dr. Roach: My heartbeat is around 98-100 per minute. I checked with my primary doctor, and she said it’s normal, as I am getting older. (I’m 48 now, female, and other than heartbeat, my health is normal.

Dear Dr. Roach: I monitor my blood pressure at home as part of my regular wellness routine. The instructions for the blood pressure monitor say to sit upright, keep my feet on the floor and to not place the cuff over clothing.

Dear Dr. Roach: Would you write about seasonal affective disorder to help so many others who may be suffering with this, but don’t even know it? I was diagnosed with clinical depression after a move to Wisconsin from Southern California.