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Drug Interactions between Cordarone IV and Norisodrine with Calcium Iodine

This report displays the potential drug interactions for the following 2 drugs:

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Interactions between your drugs

Major

amiodarone isoproterenol

Applies to: Cordarone IV (amiodarone) and Norisodrine with Calcium Iodine (anhydrous calcium iodide / isoproterenol)

MONITOR CLOSELY: Beta-2 adrenergic agonists can cause dose-related prolongation of the QT interval and potassium loss. Theoretically, coadministration with other agents that can prolong the QT interval may result in additive effects and increased risk of ventricular arrhythmias including torsade de pointes and sudden death. In general, the risk of an individual agent or a combination of agents causing ventricular arrhythmia in association with QT prolongation is largely unpredictable but may be increased by certain underlying risk factors such as congenital long QT syndrome, cardiac disease, and electrolyte disturbances (e.g., hypokalemia, hypomagnesemia). In addition, the extent of drug-induced QT prolongation is dependent on the particular drug(s) involved and dosage(s) of the drug(s). Clinically significant prolongation of QT interval and hypokalemia occur infrequently when beta-2 adrenergic agonists are inhaled at normally recommended dosages. However, these effects may be more common when the drugs are administered systemically or when recommended dosages are exceeded.

MANAGEMENT: Caution is advised if beta-2 adrenergic agonists are used in combination with other drugs that prolong the QT interval, including class IA and III antiarrhythmic agents, certain neuroleptic agents, phenothiazines, tricyclic antidepressants, quinolones, ketolide and macrolide antibiotics, and cisapride. It may be appropriate to monitor ECG and serum electrolytes during chronic systemic use or high-dose therapy. Patients should be advised to seek medical attention if they experience symptoms that could indicate the occurrence of torsade de pointes such as dizziness, lightheadedness, fainting, palpitations, irregular heartbeat, shortness of breath, or syncope.

References

  1. Whyte KF, Addis GJ, Whitesmith R, Reid JL (1987) "The mechanism of salbutamol-induced hypokalaemia." Br J Clin Pharmacol, 23, p. 65-71
  2. Larsson S, Svedmyr N (1977) "Bronchodilating effect and side effects of beta2- adrenoceptor stimulants by different modes of administration (tablets, metered aerosol, and combinations thereof). A study with salbutamol inasthmatics." Am Rev Respir Dis, 116, p. 861-9
  3. Hastwell G, Lambert BE (1978) "The effect of oral salbutamol on serum potassium and blood sugar." Br J Obstet Gynaecol, 85, p. 767-9
  4. (1981) "Hypokalaemia due to salbutamol overdosage." Br Med J (Clin Res Ed), 283, p. 500-1
  5. Kantola I, Tarssanen L (1986) "Hypokalemia from usual salbutamol dosage ." Chest, 89, p. 619-20
  6. Wong CS, Pavord ID, Williams J, Britton JR, Tattersfield AE (1990) "Bronchodilator, cardiovascular, and hypokalaemic effects of fenoterol, salbutamol, and terbutaline in asthma." Lancet, 336, p. 1396-9
  7. Gross TL, Sokol RJ (1980) "Severe hypokalemia and acidosis: a potential complication of beta- adrenergic treatment." Am J Obstet Gynecol, 138, p. 1225-6
  8. Clifton GD, Hunt BA, Patel RC, Burki NK (1990) "Effects of sequential doses of parenteral terbutaline on plasma levels of potassium and related cardiopulmonary responses." Am Rev Respir Dis, 141, p. 575-9
  9. Hurlbert BJ, Edelman JD, David K (1981) "Serum potassium levels during and after terbutaline." Anesth Analg, 60, p. 723-5
  10. Bengtsson B, Fagerstrom PO (1982) "Extrapulmonary effects of terbutaline during prolonged administration." Clin Pharmacol Ther, 31, p. 726-32
  11. Gelmont DM, Balmes JR, Yee A (1988) "Hypokalemia induced by inhaled bronchodilators." Chest, 94, p. 763-6
  12. Sanders JP, Potter DE, Ellis S, Bee DE, Grant JA (1977) "Metabolic and cardiovascular effects of carbuterol and metaproterenol." J Allergy Clin Immunol, 60, p. 174-9
  13. (2002) "Product Information. Proventil (albuterol)." Schering Corporation
  14. Windom H, Grainger J, Burgess C, Crane J, Pearce N, Beasley R (1990) "A comparison of the haemodynamic and hypokalaemic effects of inhaled pirbuterol and salbutamol." N Z Med J, 103, p. 259-61
  15. "Product Information. Serevent (salmeterol)." Glaxo Wellcome
  16. (2001) "Product Information. Maxair (pirbuterol)." 3M Pharmaceuticals
  17. Dickens GR, Mccoy RA, West R, Stapczynski JS, Clifton GD (1994) "Effect of nebulized albuterol on serum potassium and cardiac rhythm in patients with asthma or chronic obstructive pulmonary disease." Pharmacotherapy, 14, p. 729-33
  18. Tveskov C, Djurhuus MS, Klitgaard NAH, Egstrup K (1994) "Potassium and magnesium distribution, ECG changes, and ventricular ectopic beats during beta(2)-adrenergic stimulation with terbutaline in healthy subjects." Chest, 106, p. 1654-9
  19. Braden GL, vonOeyen PT, Germain MJ, Watson DJ, Haag BL (1997) "Ritodrine- and terbutaline-induced hypokalemia in preterm labor: Mechanisms and consequences." Kidney Int, 51, p. 1867-75
  20. Rakhmanina NY, Kearns GL, Farrar HC (1998) "Hypokalemia in an asthmatic child from abuse of albuterol metered dose inhaler." Pediatr Emerg Care, 14, p. 145-7
  21. (2001) "Product Information. Xopenex (levalbuterol)." Sepracor Inc
  22. (2001) "Product Information. Foradil (formoterol)." Novartis Pharmaceuticals
  23. Ferguson GT, Funck-Brentano C, Fischer T, Darken P, Reisner C (2003) "Cardiovascular Safety of Salmeterol in COPD." Chest, 123, p. 1817-24
  24. Milic M, Bao X, Rizos D, Liu F, Ziegler MG (2006) "Literature review and pilot studies of the effect of qt correction formulas on reported beta(2)-agonist-induced QTc prolongation." Clin Ther, 28, p. 582-90
  25. (2006) "Product Information. Brovana (arformoterol)." Sepracor Inc
  26. Lowe MD, Rowland E, Brown MJ, Grace AA (2001) "Beta(2) adrenergic receptors mediate important electrophysiological effects in human ventricular myocardium." Heart, 86, p. 45-51
  27. Sun ZH, Swan H, Vitasalo M, Toivonen L (1998) "Effects of epinephrine and phenylephrine on QT interval dispersion in congenital long QT syndrome." J Am Coll Cardiol, 31, p. 1400-5
View all 27 references

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Drug and food interactions

Major

amiodarone food

Applies to: Cordarone IV (amiodarone)

GENERALLY AVOID: Grapefruit juice may significantly increase the plasma concentrations of orally administered amiodarone. The proposed mechanism is inhibition of CYP450 3A4-mediated first-pass metabolism in the gut wall by certain compounds present in grapefruits. In 11 nonsmoking, healthy volunteers, grapefruit juice (300 mL with drug administration, then 3 hours and 9 hours later) increased the mean peak plasma concentration (Cmax) and area under the concentration-time curve (AUC) of amiodarone (17 mg/kg single dose) by 84% and 50%, respectively, compared to water. Formation of the pharmacologically active metabolite, N-desethylamiodarone (N-DEA), was completely inhibited. Clinically, this interaction can lead to altered efficacy of amiodarone, since antiarrhythmic properties of amiodarone and N-DEA appear to differ. In the study, mean increases in PR and QTc intervals of 17.9% and 11.3%, respectively, were observed 6 hours postdose with water, while increases of 10.2% and 3.3%, respectively, were observed after administration with grapefruit juice.

ADJUST DOSING INTERVAL: Food increases the rate and extent of absorption of amiodarone. The mechanism appears to involve the effect of food-induced physiologic changes on drug release from its formulation. In 30 healthy volunteers, administration of a single 600 mg dose of amiodarone following a high-fat meal resulted in a Cmax and AUC that were 3.8 and 2.4 times the respective values under fasting conditions. The time to reach peak plasma concentration (Tmax) was decreased by 37%, indicating an increased rate of absorption. Mean Cmax and AUC for the active metabolite, N-DEA, also increased by 32% and 55%, respectively, but there was no change in the Tmax.

MANAGEMENT: Patients treated with oral amiodarone should avoid consumption of grapefruits and grapefruit juice. In addition, oral amiodarone should be administered consistently with regard to meals.

References

  1. (2002) "Product Information. Cordarone (amiodarone)." Wyeth-Ayerst Laboratories
  2. Libersa CC, Brique SA, Motte KB, et al. (2000) "Dramatic inhibition of amiodarone metabolism induced by grapefruit juice." Br J Clin Pharmacol, 49, p. 373-8
  3. Meng X, Mojaverian P, Doedee M, Lin E, Weinryb I, Chiang ST, Kowey PR (2001) "Bioavailability of Amiodarone tablets administered with and without food in healthy subjects." Am J Cardiol, 87, p. 432-5

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Moderate

isoproterenol food

Applies to: Norisodrine with Calcium Iodine (anhydrous calcium iodide / isoproterenol)

MONITOR: Coadministration of two or more sympathomimetic agents may increase the risk of adverse effects such as nervousness, irritability, and increased heart rate. Central nervous system (CNS) stimulants, particularly amphetamines, can potentiate the adrenergic response to vasopressors and other sympathomimetic agents. Additive increases in blood pressure and heart rate may occur due to enhanced peripheral sympathetic activity.

MANAGEMENT: Caution is advised if two or more sympathomimetic agents are coadministered. Pulse and blood pressure should be closely monitored.

References

  1. Rosenblatt JE, Lake CR, van Kammen DP, Ziegler MG, Bunney WE Jr (1979) "Interactions of amphetamine, pimozide, and lithium on plasma norepineophrine and dopamine-beta-hydroxylase in schizophrenic patients." Psychiatry Res, 1, p. 45-52
  2. Cavanaugh JH, Griffith JD, Oates JA (1970) "Effect of amphetamine on the pressor response to tyramine: formation of p-hydroxynorephedrine from amphetamine in man." Clin Pharmacol Ther, 11, p. 656
  3. (2001) "Product Information. Adderall (amphetamine-dextroamphetamine)." Shire Richwood Pharmaceutical Company Inc
  4. (2001) "Product Information. Tenuate (diethylpropion)." Aventis Pharmaceuticals
  5. (2001) "Product Information. Sanorex (mazindol)." Novartis Pharmaceuticals
  6. (2001) "Product Information. Focalin (dexmethylphenidate)." Mikart Inc
  7. (2002) "Product Information. Strattera (atomoxetine)." Lilly, Eli and Company
View all 7 references

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Therapeutic duplication warnings

Therapeutic duplication is the use of more than one medicine from the same drug category or therapeutic class to treat the same condition. This can be intentional in cases where drugs with similar actions are used together for demonstrated therapeutic benefit. It can also be unintentional in cases where a patient has been treated by more than one doctor, or had prescriptions filled at more than one pharmacy, and can have potentially adverse consequences.

Duplication

Systemic iodine containing compounds

Therapeutic duplication

The recommended maximum number of medicines in the 'systemic iodine containing compounds' category to be taken concurrently is usually one. Your list includes two medicines belonging to the 'systemic iodine containing compounds' category:

  • Cordarone IV (amiodarone)
  • Norisodrine with Calcium Iodine (anhydrous calcium iodide/isoproterenol)

Note: In certain circumstances, the benefits of taking this combination of drugs may outweigh any risks. Always consult your healthcare provider before making changes to your medications or dosage.

See also

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Drug Interaction Classification

These classifications are only a guideline. The relevance of a particular drug interaction to a specific individual is difficult to determine. Always consult your healthcare provider before starting or stopping any medication.
Major Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit.
Moderate Moderately clinically significant. Usually avoid combinations; use it only under special circumstances.
Minor Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan.
Unknown No interaction information available.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

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