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Dear Dr. Roach: I had a St.聽Jude鈥檚 aortic valve put in in 1998. I have taken Coumadin since that time. A couple of years ago, my doctors changed the goal for my INR to 2-3. I don鈥檛 know why.

Dear Dr. Roach: I鈥檝e been having trouble with boils for a couple of years. Last year, my doctor told me that it was a staph infection.

Dear Dr. Roach: I am a 66-year-old woman who had early-stage breast cancer and routine sessions of radiation after a lumpectomy. Everything went very well. Less than two years later, I had a mild silent heart attack. I have always been healthy.

We鈥檝e been told for years that a nutritious apple a day helps to keep the doctor away.

Dear Dr. Roach: I am an 84-year-old man in good health. I have been taking tamsulosin (Flomax) for the past six months for my enlarged prostate, and it works fine for problems with urination. However, it causes reduced libido and reduced ejaculation.

Dear Dr. Roach: My cousin has a significant degree of liver cirrhosis from a metastatic carcinoid. The carcinoid hasn't grown in a couple of years, but the cirrhosis continues to progress.

Samuel Johnson once remarked, 鈥淣othing sharpens the wit so much as the knowledge you鈥檙e going to be hanged in the morning.

Dear Dr. Roach: In my local community, there is an offer for an X-ray test ($99) to see if a past smoker is developing lung cancer. We both quit in 1996.

Dear Dr. Roach: I think I may have herpes, but I鈥檓 not sure.

Why is it impossible for reporters to get it right about supplements? In March of 2013, medical research showed that every day, 290 North Americans die from prescription drugs.