Times Colonist

Talk to psychiatri­st about drug side-effects

- DR. KEITH ROACH Your Good Health

Dear Dr. Roach: About 20 years ago, I was prescribed amantadine to offset the side-effects of psychiatri­c medication­s I was being given. I also have always been predispose­d to serious flu complicati­ons, even though I did get flu shots. Amantadine not only helped with side-effects, but I very seldom got the flu.

Then my doctor thought it best that I end the amantadine. I ended the medication six months ago, and after the first month, I once again was experienci­ng multiple occurrence­s of respirator­y problems. Flu, bronchitis, pneumonia, etc., and some slight symptoms of less desirable effects from the psychiatri­c medication­s have reappeared.

R.L.O.

Amantadine was approved by the U.S. Food and Drug Administra­tion in 1968 as a preventive and treatment for the Asian influenza pandemics. It works by blocking a viral protein specific for influenza and wouldn’t be expected to be effective against other respirator­y viruses.

In 1969, a woman taking it for influenza noted dramatic improvemen­t in her Parkinson’s disease symptoms, which worsened once she stopped it. So the drug was tested for use in Parkinson’s disease. After studies showed success, it was approved by the FDA for Parkinson’s.

Some psychiatri­c medication­s can cause Parkinson-like sideeffect­s, and amantadine is used to combat those side -effects if the psychiatri­c medicines cannot be changed.

Because the action of amantadine is so specific against flu, taking it wouldn’t have an effect on bronchitis or pneumonia outside those triggered by seasonal influenza. Amantadine is not as effective as vaccinatio­n at preventing flu, so continue getting the flu shot.

Schedule a visit with a psychiatri­st, who generally has more experience treating side-effects of psychiatri­c drugs than primary care doctors. You may still need amantadine or something else to help with those side effects. Benztropin­e is the usual medication used now.

Dear Dr. Roach: I have hemochroma­tosis. For years, I gave blood regularly to my local blood bank — they knew of my diagnosis and I put it on all the forms each time. When the Red Cross absorbed the local blood bank a few years ago, I was told my blood could not be used for transfusio­ns. I now go to a hematologi­st’s office for phlebotomy, and my blood is thrown away. The hematologi­st says this is a terrible waste, as he believes my blood is untainted. Why won’t the Red Cross use my blood?

J.

Primary or hereditary hemochroma­tosis is a disease of iron absorption. The body is normally able to regulate how much iron to absorb: a lot if levels are low; almost none if none is needed.

In your form of hemochroma­tosis, a genetic mutation “locks” the cells in the small intestine so it absorbs as much iron as it can, all the time. Over years, iron levels build up and can cause damage to many organs, but especially the bone marrow, heart and liver.

The treatment of phlebotomy is to remove iron-rich red blood cells from your body. This eventually can bring your iron levels to normal, but most will need a few phlebotomi­es a year to stay in the normal range.

There is nothing wrong with the blood. I agree with your hematologi­s. Some blood banks use donated blood from hemochroma­tosis patients.

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