Azithro; Clarithro; Erythromycin/Slt QT Prolonging Agents
This information is generalized and not intended as specific medical advice. Consult your healthcare professional before taking or discontinuing any drug or commencing any course of treatment.
Medical warning:
Severe. These medicines may interact and cause very harmful effects and are usually not taken together. Contact your healthcare professional (e.g. doctor or pharmacist) for more information.
How the interaction occurs:
Both of your medicines may affect your heart's rhythm.
What might happen:
Taking two or more medicines that can affect your heart rhythm may increase your risk of an irregular heartbeat, which may be life-threatening.
What you should do about this interaction:
Let your healthcare professionals (e.g doctor or pharmacist) know right away that you are taking these medications together. Let your doctor know right away if you notice an irregular heartbeat or have dizziness or fainting episodes.Your healthcare professionals may already be aware of this interaction and may be monitoring you for it. Do not start, stop, or change the dosage of any medicine before checking with them first.
References:
1.Firdapse (amifampridine phosphate) UK summary of product characteristics. BioMarin Europe Limited February, 2010.
2.Cordarone X (amiodarone hydrochloride) Australian prescribing information. Sanofi-Synthelabo Australia Pty Limited Augsut 15, 2007.
3.Cordarone X (amiodarone hydrochloride) UK summary of product characteristics. Sanofi-Aventis July 6, 2010.
4.Cordarone (amiodarone hydrochloride) US prescribing information. Wyeth Pharmaceuticals November, 2011.
5.Vascor (bepridil hydrochloride) US prescribing information. Ortho-McNeil Pharmaceutical, Inc. March, 2000.
6.Rythmodan (disopyramide) Australian prescribing information. Aventis Pharma Pty Ltd. September 22, 2000.
7.Inapsine (droperidol) US prescribing information. Akorn, Inc. November, 2001.
8.Halfan (halofantrine hydrochloride) US prescribing information. SmithKline Beecham Pharmaceuticals October, 2001.
9.Orlaam (levomethadyl acetate hydrochloride) US prescribing information. Roxane Laboratories, Inc. May, 2001.
10.Serdolect (sertindole) UK summary of product characteristics. Lundbeck Limited October 25, 1996.
11.Zagam (sparfloxacin) US prescribing information. Bertek Pharmaceuticals, Inc. February, 2003.
12.The University of Arizona Center for Education and Research of Therapeutics. Drugs with Risk of Torsades de Pointes and Drugs with Possible Risk of Torsades de Pointes. Available at:http://www.crediblemeds.org/. Updated March 14, 2013.
13.Zithromax (azithromycin oral) US prescribing information. Pifzer Labs February 19, 2013.
14.Drew BJ, Ackerman MJ, Funk M, Gibler WB, Kligfield P, Menon V, Philippides GJ, Roden DM, Zareba W. Prevention of torsade de pointes in hospital settings: a scientific statement from the American Heart Association and the American College of Cardiology Foundation. J Am Coll Cardiol 2010 Mar 2;55(9):934-47.
