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Drug Interaction Report

4 potential interactions and/or warnings found for the following 2 drugs:

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Interactions between your drugs

Moderate

cinoxacin phenyl salicylate

Applies to: cinoxacin, Usept (hyoscyamine / methenamine / methylene blue / phenyl salicylate)

MONITOR: Coadministration with nonsteroidal anti-inflammatory drugs (NSAIDs) may potentiate the risk of central nervous system toxicity sometimes associated with fluoroquinolone use. The interaction has been reported most often with enoxacin. It may occur with other fluoroquinolones as well, but is poorly documented. The exact mechanism of interaction is unknown. Some investigators suggest that the piperazine ring of fluoroquinolones may inhibit the binding of gamma-aminobutyric acid (GABA) to brain receptors and that NSAIDs may synergistically add to this effect. Patients with a history of seizures may be at greater risk.

MANAGEMENT: Clinical monitoring for signs of CNS stimulation such as tremors, involuntary muscle movements, hallucinations, or seizures is recommended if fluoroquinolone antibiotics are prescribed in combination with NSAIDs.

References

  1. Ball P (1986) "Ciprofloxacin: an overview of adverse experiences." J Antimicrob Chemother, 18, p. 187-93
  2. Hooper DC, Wolfson JS (1985) "The fluoroquinolones: pharmacology, clinical uses, and toxicities in humans." Antimicrob Agents Chemother, 28, p. 716-21
  3. (2002) "Product Information. Cipro (ciprofloxacin)." Bayer
  4. (2002) "Product Information. Penetrex (enoxacin)." Rhone Poulenc Rorer
  5. (2001) "Product Information. Floxin (ofloxacin)." Ortho McNeil Pharmaceutical
  6. Domagala JM (1994) "Structure-activity and structure-side-effect relationships for the quinolone antibacterials." J Antimicrob Chemother, 33, p. 685-706
  7. (2001) "Product Information. Levaquin (levofloxacin)." Ortho McNeil Pharmaceutical
  8. (2001) "Product Information. Raxar (grepafloxacin)." Glaxo Wellcome
  9. Davey PG (1988) "Overview of drug interactions with the quinolones." J Antimicrob Chemother, 22(suppl c), p. 97-107
  10. Ball P, Tillotson G (1996) "Tolerability of fluoroquinolone antibiotics: past, present and future." Drug Saf, 13, p. 343-8
  11. (2001) "Product Information. Avelox (moxifloxacin)." Bayer
  12. (2001) "Product Information. Tequin (gatifloxacin)." Bristol-Myers Squibb
  13. (2003) "Product Information. Factive (gemifloxacin)." *GeneSoft Inc
  14. Segev S. Rehavi M, Rubinstein E (1988) "Quinolones, theophylline, and diclofenac interactions with the gamma-aminobutyric acid receptor." Antimicrob Agents Chemother, 32, p. 1624-6
View all 14 references

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Drug and food interactions

Moderate

hyoscyamine food

Applies to: Usept (hyoscyamine / methenamine / methylene blue / phenyl salicylate)

GENERALLY AVOID: Use of anticholinergic agents with alcohol may result in sufficient impairment of attention so as to render driving and operating machinery more hazardous. In addition, the potential for abuse may be increased with the combination. The mechanism of interaction is not established but may involve additive depressant effects on the central nervous system. No effect of oral propantheline or atropine on blood alcohol levels was observed in healthy volunteers when administered before ingestion of a standard ethanol load. However, one study found impairment of attention in subjects given atropine 0.5 mg or glycopyrrolate 1 mg in combination with alcohol.

MANAGEMENT: Alcohol should generally be avoided during therapy with anticholinergic agents. Patients should be counseled to avoid activities requiring mental alertness until they know how these agents affect them.

References

  1. Linnoila M (1973) "Drug effects on psychomotor skills related to driving: interaction of atropine, glycopyrrhonium and alcohol." Eur J Clin Pharmacol, 6, p. 107-12

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Moderate

cinoxacin food

Applies to: cinoxacin

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

Urinary anti-infectives

Therapeutic duplication

The recommended maximum number of medicines in the 'urinary anti-infectives' category to be taken concurrently is usually one. Your list includes two medicines belonging to the 'urinary anti-infectives' category:

  • cinoxacin
  • Usept (hyoscyamine / methenamine / methylene blue / phenyl salicylate)

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.

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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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Further information

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

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