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Drug Interactions between Brovana and ofloxacin

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

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Interactions between your drugs

Moderate

ofloxacin arformoterol

Applies to: ofloxacin and Brovana (arformoterol)

MONITOR: 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 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 recommended if beta-2 agonists are used in combination with other drugs that can prolong the QT interval. Patients should be advised to seek prompt medical attention if they experience symptoms that could indicate the occurrence of torsade de pointes such as dizziness, lightheadedness, fainting, palpitation, irregular heart rhythm, shortness of breath, or syncope.

References (30)
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  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
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  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
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  30. (2014) "Product Information. Striverdi Respimat (olodaterol)." Boehringer Ingelheim

Drug and food/lifestyle interactions

Moderate

ofloxacin food/lifestyle

Applies to: ofloxacin

GENERALLY AVOID: The oral bioavailability of quinolone and tetracycline antibiotics may be reduced by concurrent administration of preparations containing polyvalent cations such as aluminum, calcium, iron, magnesium, and zinc. Therapeutic failure may result. The proposed mechanism is chelation of quinolone and tetracycline antibiotics by di- and trivalent cations, forming an insoluble complex that is poorly absorbed from the gastrointestinal tract. Reduced gastrointestinal absorption of the cations should also be considered.

MANAGEMENT: Concomitant administration of oral quinolone and tetracycline antibiotics with preparations containing aluminum, calcium, iron, magnesium, and/or zinc salts should generally be avoided. Otherwise, the times of administration should be staggered by as much as possible to minimize the potential for interaction. Quinolones should typically be dosed either 2 to 4 hours before or 4 to 6 hours after polyvalent cation preparations, depending on the quinolone and formulation. Likewise, tetracyclines and polyvalent cation preparations should typically be administered 2 to 4 hours apart. The prescribing information for the antibiotic should be consulted for more specific dosing recommendations.

References (51)
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  4. Frost RW, Lasseter KC, Noe AJ, Shamblen EC, Lettieri JT (1992) "Effects of aluminum hydroxide and calcium carbonate antacids on the bioavailability of ciprofloxacin." Antimicrob Agents Chemother, 36, p. 830-2
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  8. Nguyen VX, Nix DE, Gillikin S, Schentag JJ (1989) "Effect of oral antacid administration on the pharmacokinetics of intravenous doxycycline." Antimicrob Agents Chemother, 33, p. 434-6
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  10. Parpia SH, Nix DE, Hejmanowski LG, Goldstein HR, Wilton JH, Schentag JJ (1989) "Sucralfate reduces the gastrointestinal absorption of norfloxacin." Antimicrob Agents Chemother, 33, p. 99-102
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  12. Akerele JO, Okhamafe AO (1991) "Influence of oral co-administered metallic drugs on ofloxacin pharmacokinetics." J Antimicrob Chemother, 28, p. 87-94
  13. Gothoni G, Neuvonen PJ, Mattila M, Hackman R (1972) "Iron-tetracycline interaction: effect of time interval between the drugs." Acta Med Scand, 191, p. 409-11
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  17. D'Arcy PF, McElnay JC (1987) "Drug-antacid interactions: assessment of clinical importance." Drug Intell Clin Pharm, 21, p. 607-17
  18. Wadworth AN, Goa KL (1991) "Lomefloxacin: a review of its antibacterial activity, pharmacokinetic properties and therapeutic use." Drugs, 42, p. 1018-60
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Therapeutic duplication warnings

No warnings were found for your selected drugs.

Therapeutic duplication warnings are only returned when drugs within the same group exceed the recommended therapeutic duplication maximum.

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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.

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