Health Articles - Dauphin Clinic Pharmacy

By: Dauphin Clinic Pharmacy  09-12-2011
Keywords: medications, Clinic Pharmacy

By Trevor Shewfelt, Pharmacist at the Dauphin Clinic Pharmacy

Peace.  It’s not a bad word.  It is not a curse word.  But it has been annoying me to no end recently.  I’m not against peace in theMiddle East, or inner peace, or even Christmas carols that wish Peace on Earth.  Peace annoys me because my nine year old daughter,Emily has turned it into her universal greeting.  Emily no longer says “Hello,” when meeting people, or “Good-bye” when leaving the house.  And Emily no longer waves her hand like a normal person when she is coming or going.  No, now Emily makes a peace sign with her first two fingers and just says, “Peace” whenever she sees me.  She will often say, “Peace” when she is just coming into, or leaving a room.  I don’t think this is a throw back to the hippies of her grandparent’s era.  I think “Peace” is supposed to be an homage to the current hip hop stars.  I don’t really like hip hop either, but that is a gripe for another day.  Emily’s greeting of “Peace” is just so odd sounding to me.  I don’t want to sound like a 92 year old man but, I think “Hello” and “Good-bye” are perfectly good greetings. I don’t think kids these day should mess with these greetings by replacing everything with “Peace.”

When you have depression, it can be very hard to find peace.  Most of us have said, “I feel depressed” at one time or another, but that is often not what a clinically depressed person would say.  If clinically depressed person goes to see their doctor, it is often about the physical symptoms they have.  They will tell their doctor that they have stomach problems, a lack of energy, a change in their appetite, or a lot of pain like head aches or muscle pain.

One of the ways we treat depression is with antidepressant medications.  The most common type of antidepressants are the SSRI’s or selective serotonin reuptake inhibitors.  During a recent round of medication reviews at the Dauphin Personal Care Home (PCH), Crystal Drayson and I discussed the dose of the SSRI citalopram in one of the patients. Crystalis the Mental Health nurse at the PCH and we’d both read reports that the upper dose of citalopram should be reduced.  Citalopram used to be prescribed up to 60 mg per day, but new reports from the Food and Drug Administration (FDA) in theUSsay high doses of citalopram may prolong the QT interval and that can be hard on the heart.

What is the QT interval?  When a doctor hooks electrodes up to your chest to check your heart, they are looking at an ECG or electrocardiogram.  One of the parts of the ECG print-out is called the QT interval.  If the QT interval gets too long, the patient is at an increased risk of a certain type of heart problem called torsades de pointes.  Torsades de pointes can cause cardiac arrest.  Fortunately, torsades de pointes is a rare condition.  Risk factors for torsades include advanced age, being female, having heart disease already, being on a water pill and being on more than one medication that prolong the QT interval.

There are actually lots of medications that prolong the QT interval.  Heart medications like sotalol,  antibiotics like clarithromycin, ADHD medications like Ritalin, antifungal medications like fluconazole, antihistamines like diphenhydramine (benadryl) and decongestants like pseudoephedrine (Sudafed) can all prolong the QT interval.  So the fact that citalopram prolongs the QT interval is not a rare drug related event.  And like many other drugs, citalopram’s effect on the QT interval is dose dependent.

The FDA report said citalopram 20 mg per day increased the QT interval by 8.5 ms, 40 mg per day increased it by 12.6 ms and 60 mg increased it by 18.5 ms.  Because increasing the QT interval increases the chance of the rare torsades de pointes, the FDA now says citalopram should not be used at 60mg per day anymore.  The FDA says 40 mg per day of citalopram is the maximum dose for anyone.  They further said that anyone over 60 years old shouldn’t use more than 20 mg per day of citalopram. 

Another interesting recommendation that came out of the FDA report was to only use citalopram at 20 mg per day for patients on certain other medications like omeprazole.  Omeprazole is a stomach medication, but it happens to effect an enzyme that breaks down citalopram.  So if you take omeprazole and citalopram together that could increase the amount of citalopram in your system.  Again that could prolong your QT interval.

So what should you do if you are currently taking a high dose of citalopram?  Keep taking it.  Don’t stop or adjust your medication dose on your own.  You can definitely get side effects from stopping citalopram.  Remember, even at a high dose of citalopram, the chance of heart problems are low.  However, if you are on a high dose of citalopram, make an appointment with your doctor.  The two of you can assess your risk of heart problems and decide how to proceed in your case.

Maybe sounding like a 92 year old man and griping isn’t so bad.  Andy Rooney griped about things on 60 Minutes from 1978 until this October.  He is 92 years old and is just now retiring from the show.  Hopefully if I keep griping, I might have a career as long as Mr. Rooney’s.

The information in this article is intended as a helpful guide only.  It is not intended to be used as a substitute for professional advice.  If you have any questions about your medications and what is right for you see your doctor, pharmacist or other health care professional.

Keywords: Clinic Pharmacy, medications

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