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Drug Interactions between methoxsalen and ofloxacin

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

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Interactions between your drugs

Moderate

ofloxacin methoxsalen

Applies to: ofloxacin and methoxsalen

MONITOR: Concomitant use of methoxsalen with other known photosensitizing agents may increase the risk of photosensitivity reactions. These agents include anthralin, coal tar or coal tar derivatives, griseofulvin, hypericin extracts (e.g., St John's Wort), fluoroquinolones, phenothiazines, retinoids, halogenated salicylanilides (bacteriostatic soaps), sulfonamides, sulfonylureas, tetracyclines, thiazides, and certain organic staining dyes such as methylene blue, toluidine blue, rose bengal, and methyl orange.

MANAGEMENT: Caution is advised and pharmacologic response to methoxsalen therapy should be carefully monitored if concomitant use of other photosensitizing agents cannot be avoided. Patients should be advised to avoid sun exposure, even through window glass or cloud cover, for at least 8 hours after methoxsalen ingestion and during the 24 hours following photochemotherapy or photopheresis treatment. Protective devices should be used if sun exposure cannot be avoided, such as a hat and gloves and/or sunscreens containing ingredients that filter out UVA radiation (e.g., benzophenone and/or PABA esters). Sunscreens must be applied to all areas that might be exposed to the sun, including the lips. For the treatment of psoriasis, sunscreens should not be applied to areas affected by psoriasis until after treatment in the UVA chamber. In addition, UVA-absorbing wrap-around sunglasses should be worn during daylight for 24 hours after methoxsalen ingestion and during the 24 hours following photochemotherapy or photopheresis treatment to prevent the irreversible binding of methoxsalen to proteins and DNA components of the lens, which can lead to formation of cataracts. The glasses should be worn any time patients are exposed to direct or indirect sunlight, whether they are outdoors or exposed through a window. Because erythema and/or burning due to photochemotherapy and sunburn due to sun exposure are additive, patients should not sunbathe for 48 hours after photochemotherapy.

References

  1. "Multum Information Services, Inc. Expert Review Panel"
  2. (2001) "Product Information. Oxsoralen (methoxsalen)." ICN Pharmaceuticals Inc
  3. Hoffman GA, Gradl G, Schulz M, Haidinger G, Tanew A, Weber B (2020) "The frequency of photosensitizing drug dispensings in Austria and Germany: A correlation with their photosensitizing potential based on published literature." J Eur Acad Dermatol Venereol, 34, p. 589-600
  4. Blakely KM, Drucker AM, Rosen CF (2019) "Drug-induced photosensitivity—an update: Culprit drugs, prevention and management." Drug Saf, 42, p. 827-47
  5. (2023) "Product Information. Uvadex (methoxsalen)." Therakos (UK) Ltd
  6. (2019) "Product Information. Methoxsalen (methoxsalen)." Strides Pharma Inc.
  7. (2021) "Product Information. Uvadex (methoxsalen)." Therakos Inc
  8. Ikaria Australia Pty Ltd (2023) Australian product information - uvadex (methoxsalen) concentrated injection. https://www.ebs.tga.gov.au/ebs/picmi/picmirepository.nsf/pdf?OpenAgent=&id=CP-2022-PI-02125-1&d=20230530172310101
View all 8 references

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Drug and food interactions

Moderate

methoxsalen food

Applies to: methoxsalen

GENERALLY AVOID: The ingestion of foods containing photosensitizing components (e.g., limes, figs, parsley, parsnips, rue (Ruta graveolens), mustard, carrots and celery) may increase the risk of photosensitivity and severe burning during methoxsalen therapy. Two cases of photosensitivity involving rue and a soup containing celery, parsley, and parsnip have been reported in PUVA patients.

MANAGEMENT: Patients who are undergoing PUVA treatment and taking methoxsalen should be advised to avoid eating large quantities of these foods.

References

  1. the Australasian Society of Clinical and Experimental Pharmacologists and Toxicologists (ASCEPT), Royal Australian College of General Practicioners (RACGP), the Pharmaceutical Society of Australia (PSA) (2007) Australian Medicines Handbook. https://www.amh.net.au/

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Moderate

ofloxacin food

Applies to: 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 (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

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.

Further information

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