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Drug Interactions between Floxin IV and Ketek Pak

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

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Interactions between your drugs

Moderate

ofloxacin telithromycin

Applies to: Floxin IV (ofloxacin) and Ketek Pak (telithromycin)

MONITOR: Certain quinolones, including levofloxacin, norfloxacin, and ofloxacin, may cause dose-related prolongation of the QT interval in some patients. 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. During postmarketing surveillance, rare cases of torsade de pointes and ventricular tachycardia have been reported in patients taking levofloxacin, norfloxacin, and ofloxacin. The levofloxacin cases primarily involved patients with underlying medical conditions or taking concomitant medications that may have been contributory. 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).

MANAGEMENT: Although the risk of a serious interaction is probably low, caution is recommended if levofloxacin, norfloxacin, or ofloxacin is used in combination with other drugs that can prolong the QT interval. Since the magnitude of QTc prolongation increases with increasing plasma concentrations of the quinolone, recommended dosages and intravenous infusion rates should not be exceeded. 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

  1. "Product Information. Floxin (ofloxacin)." Ortho McNeil Pharmaceutical PROD (2001):
  2. Thomas M, Maconochie JG, Fletcher E "The dilemma of the prolonged QT interval in early drug studies." Br J Clin Pharmacol 41 (1996): 77-81
  3. "Product Information. Levaquin (levofloxacin)." Ortho McNeil Pharmaceutical PROD (2001):
  4. Samaha FF "QTC interval prolongation and polymorphic ventricular tachycardia in association with levofloxacin." Am J Med 107 (1999): 528-9
  5. Iannini PB, Doddamani S, Byazrova E, Curciumaru I, Kramer H "Risk of torsades de pointes with non-cardiac drugs. Prolongation of QT interval is probably a class effect of fluoroquinolones." Br Med J 322 (2001): 46-7
  6. Owens RC "Risk assessment for antimicrobial agent-induced QTc interval prolongation and torsades de pointes." Pharmacotherapy 21 (2001): 301-19
  7. Ball P "Quinolone-induced QT interval prolongation: a not-so-unexpected class effect." J Antimicrob Chemother 45 (2000): 557-9
  8. Kang J, Wang L, Chen XL, Triggle DJ, Rampe D "Interactions of a series of fluoroquinolone antibacterial drugs with the human cardiac K+ channel HERG." Mol Pharmacol 59 (2001): 122-6
  9. Kahn JB "Latest industry information on the safety profile of levofloxacin in the US." Chemotherapy 47 Suppl 3 (2001): 32-7
  10. Frothingham R "Rates of torsades de pointes associated with ciprofloxacin, ofloxacin, levofloxacin, gatifloxacin, and moxifloxacin." Pharmacotherapy 21 (2001): 1468-72
  11. Oliphant CM, Green GM "Quinolones: a comprehensive review." Am Fam Physician 65 (2002): 455-64
  12. Owens RC Jr, Ambrose PG "Torsades de pointes associated with fluoroquinolones." Pharmacotherapy 22 (2002): 663-8; discussion 668-72
  13. Noel GJ, Natarajan J, Chien S, Hunt TL, Goodman DB, Abels R "Effects of three fluoroquinolones on QT interval in healthy adults after single doses." Clin Pharmacol Ther 73 (2003): 292-303
  14. Iannini PB "Cardiotoxicity of macrolides, ketolides and fluoroquinolones that prolong the QTc interval." Expert Opin Drug Saf 1 (2002): 121-8
  15. Owens RC "QT Prolongation with Antimicrobial Agents : Understanding the Significance." Drugs 64 (2004): 1091-124
  16. Nykamp DL, Blackmon CL, Schmidt PE, Roberson AG "QTc prolongation associated with combination therapy of levofloxacin, imipramine, and fluoxetine." Ann Pharmacother 39 (2005): 543-6
  17. Katritsis D, Camm AJ "Quinolones: cardioprotective or cardiotoxic." Pacing Clin Electrophysiol 26 (2003): 2317-20
  18. Stahlmann R "Clinical toxicological aspects of fluoroquinolones." Toxicol Lett 127 (2002): 269-77
  19. Makaryus AN, Byrns K, Makaryus MN, Natarajan U, Singer C, Goldner B "Effect of ciprofloxacin and levofloxacin on the QT interval: is this a significant "clinical" event?" South Med J 99 (2006): 52-6
  20. Cerner Multum, Inc. "UK Summary of Product Characteristics." O 0
  21. Canadian Pharmacists Association "e-CPS. http://www.pharmacists.ca/function/Subscriptions/ecps.cfm?link=eCPS_quikLink" (2006):
  22. Falagas ME, Rafailidis PI, Rosmarakis ES "Arrhythmias associated with fluoroquinolone therapy." Int J Antimicrob Agents 29 (2007): 374-9
  23. Cerner Multum, Inc. "Australian Product Information." O 0
View all 23 references

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Drug and food interactions

Moderate

ofloxacin food

Applies to: Floxin IV (ofloxacin)

ADJUST DOSING INTERVAL: Oral preparations that contain magnesium, aluminum, or calcium may significantly decrease the gastrointestinal absorption of quinolone antibiotics. Absorption may also be reduced by sucralfate, which contains aluminum, as well as other polyvalent cations such as iron and zinc. The mechanism is chelation of quinolones by polyvalent cations, forming a complex that is poorly absorbed from the gastrointestinal tract. The bioavailability of ciprofloxacin has been reported to decrease by as much as 90% when administered with antacids containing aluminum or magnesium hydroxide.

MANAGEMENT: When coadministration cannot be avoided, quinolone antibiotics should be dosed either 2 to 4 hours before or 4 to 6 hours after polyvalent cation-containing products to minimize the potential for interaction. When coadministered with Suprep Bowel Prep (magnesium/potassium/sodium sulfates), the manufacturer recommends administering fluoroquinolone antibiotics at least 2 hours before and not less than 6 hours after Suprep Bowel Prep to avoid chelation with magnesium. Please consult individual product labeling for specific recommendations.

References

  1. Polk RE, Helay DP, Sahai J, Drwal L, Racht E "Effect of ferrous sulfate and multivitamins with zinc on absorption of ciprofloxacin in normal volunteers." Antimicrob Agents Chemother 33 (1989): 1841-4
  2. Nix DE, Watson WA, Lener ME, et al. "Effects of aluminum and magnesium antacids and ranitidine on the absorption of ciprofloxacin." Clin Pharmacol Ther 46 (1989): 700-5
  3. Garrelts JC, Godley PJ, Peterie JD, Gerlach EH, Yakshe CC "Sucralfate significantly reduces ciprofloxacin concentrations in serum." Antimicrob Agents Chemother 34 (1990): 931-3
  4. Frost RW, Lasseter KC, Noe AJ, Shamblen EC, Lettieri JT "Effects of aluminum hydroxide and calcium carbonate antacids on the bioavailability of ciprofloxacin." Antimicrob Agents Chemother 36 (1992): 830-2
  5. Yuk JH "Ciprofloxacin levels when receiving sucralfate." J Am Geriatr Soc 262 (1989): 901
  6. Deppermann KM, Lode H, Hoffken G, Tschink G, Kalz C, Koeppe P "Influence of ranitidine, pirenzepine, and aluminum magnesium hydroxide on the bioavailability of various antibiotics, including amoxicillin, cephalexin, doxycycline, and amoxicillin-clavulanic acid." Antimicrob Agents Chemother 33 (1989): 1901-7
  7. Campbell NR, Kara M, Hasinoff BB, Haddara WM, McKay DW "Norfloxacin interaction with antacids and minerals." Br J Clin Pharmacol 33 (1992): 115-6
  8. Parpia SH, Nix DE, Hejmanowski LG, Goldstein HR, Wilton JH, Schentag JJ "Sucralfate reduces the gastrointestinal absorption of norfloxacin." Antimicrob Agents Chemother 33 (1989): 99-102
  9. Nix DE, Wilton JH, Ronald B, Distlerath L, Williams VC, Norman A "Inhibition of norfloxacin absorption by antacids." Antimicrob Agents Chemother 34 (1990): 432-5
  10. Akerele JO, Okhamafe AO "Influence of oral co-administered metallic drugs on ofloxacin pharmacokinetics." J Antimicrob Chemother 28 (1991): 87-94
  11. Wadworth AN, Goa KL "Lomefloxacin: a review of its antibacterial activity, pharmacokinetic properties and therapeutic use." Drugs 42 (1991): 1018-60
  12. Shimada J, Shiba K, Oguma T, et al. "Effect of antacid on absorption of the quinolone lomefloxacin." Antimicrob Agents Chemother 36 (1992): 1219-24
  13. Sahai J, Healy DP, Stotka J, Polk RE "The influence of chronic administration of calcium carbonate on the bioavailability of oral ciprofloxacin." Br J Clin Pharmacol 35 (1993): 302-4
  14. Lehto P, Kivisto KT "Effect of sucralfate on absorption of norfloxacin and ofloxacin." Antimicrob Agents Chemother 38 (1994): 248-51
  15. Noyes M, Polk RE "Norfloxacin and absorption of magnesium-aluminum." Ann Intern Med 109 (1988): 168-9
  16. Grasela TH Jr, Schentag JJ, Sedman AJ, et al. "Inhibition of enoxacin absorption by antacids or ranitidine." Antimicrob Agents Chemother 33 (1989): 615-7
  17. Lehto P, Kivisto KT "Different effects of products containing metal ions on the absorption of lomefloxacin." Clin Pharmacol Ther 56 (1994): 477-82
  18. Spivey JM, Cummings DM, Pierson NR "Failure of prostatitis treatment secondary to probable ciprofloxacin-sucralfate drug interaction." Pharmacotherapy 16 (1996): 314-6
  19. "Product Information. Levaquin (levofloxacin)." Ortho McNeil Pharmaceutical PROD (2001):
  20. "Product Information. Raxar (grepafloxacin)." Glaxo Wellcome PROD (2001):
  21. "Product Information. Zagam (sparfloxacin)." Rhone Poulenc Rorer PROD (2001):
  22. "Product Information. Trovan (trovafloxacin)." Pfizer U.S. Pharmaceuticals PROD (2001):
  23. Teng R, Dogolo LC, Willavize SA, Friedman HL, Vincent J "Effect of Maalox and omeprazole on the bioavailability of trovafloxacin." J Antimicrob Chemother 39 Suppl B (1997): 93-7
  24. Zix JA, Geerdes-Fenge HF, Rau M, Vockler J, Borner K, Koeppe P, Lode H "Pharmacokinetics of sparfloxacin and interaction with cisapride and sucralfate." Antimicrob Agents Chemother 41 (1997): 1668-72
  25. Honig PK, Gillespie BK "Clinical significance of pharmacokinetic drug interactions with over-the-counter (OTC) drugs." Clin Pharmacokinet 35 (1998): 167-71
  26. Johnson RD, Dorr MB, Talbot GH, Caille G "Effect of Maalox on the oral absorption of sparfloxacin." Clin Ther 20 (1998): 1149-58
  27. Lober S, Ziege S, Rau M, Schreiber G, Mignot A, Koeppe P, Lode H "Pharmacokinetics of gatifloxacin and interaction with an antacid containing aluminum and magnesium." Antimicrob Agents Chemother 43 (1999): 1067-71
  28. Allen A, Vousden M, Porter A, Lewis A "Effect of Maalox((R)) on the bioavailability of oral gemifloxacin in healthy volunteers." Chemotherapy 45 (1999): 504-11
  29. Kamberi M, Nakashima H, Ogawa K, Oda N, Nakano S "The effect of staggered dosing of sucralfate on oral bioavailability of sparfloxacin." Br J Clin Pharmacol 49 (2000): 98-103
  30. "Product Information. Factive (gemifloxacin)." *GeneSoft Inc (2003):
  31. "Product Information. Suprep Bowel Prep Kit (magnesium/potassium/sodium sulfates)." Braintree Laboratories (2010):
  32. "Product Information. Baxdela (delafloxacin)." Melinta Therapeutics, Inc. (2017):
View all 32 references

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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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