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Trovan and Videx EC

Determining the interaction of Trovan and Videx EC and the possibility of their joint administration.

Check result:

Trovan <> Videx EC

Relevance: 06.05.2022 Reviewer: Shkutko P.M., M.D., in

In the database of official manuals used in the service creation an interaction registered by statistical results of studies was found, which can either lead to negative consequences for the patient health or strengthen a mutual positive effect. A doctor should be consulted to address the issue of joint drug administration.

Consumer:

Using didanosine together with trovafloxacin may decrease the effects of trovafloxacin. Trovafloxacin should be administered at least 2 hours before or 2 hours after didanosine. Contact your doctor if your infection worsens. If your doctor does prescribe these medications together, you may need a dose adjustment or special test to safely use both medications. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor

Professional:

ADJUST DOSING INTERVAL: Concomitant administration with didanosine buffered tablets or pediatric oral solution may reduce the oral bioavailability of trovafloxacin and other quinolone antibiotics. The mechanism is reduced quinolone absorption due to chelation with metallic cations from buffering agents and antacids used in certain formulations of didanosine. In 12 healthy volunteers, administration of an antacid containing aluminum hydroxide-magnesium hydroxide (3600 mg-1800 mg/30 mL dose) 0.5 hour before and 2 hours after a single 300 mg dose of trovafloxacin reduced the mean peak plasma concentration (Cmax) of trovafloxacin by 61% and 11% and its area under the concentration-time curve (AUC) by 66% and 28%, respectively. The pharmacokinetics of trovafloxacin have not been studied in combination with the various didanosine formulations, but significant reductions in bioavailability have been reported for ciprofloxacin, another quinolone, in interaction studies with didanosine.

MANAGEMENT: Trovafloxacin should be administered at least 2 hours before or 2 hours after didanosine buffered tablets or pediatric oral solution, and patients should be monitored for potentially decreased antimicrobial efficacy during concomitant therapy. Didanosine buffered powder for oral solution, which uses a citrate-phosphate buffer, and the delayed-release capsules, which are not buffered, are not expected to cause this interaction.

References

Marchbanks CR "Drug-drug interactions with fluoroquinolones." Pharmacotherapy 13 (1993): s23-8
Knupp CA, Barbhaiya RH "A multiple-dose pharmacokinetic interaction study between didanosine (videx(r)) and ciprofloxacin (cipro(r)) in male subjects seropositive for HIV but asymptomatic." Biopharm Drug Dispos 18 (1997): 65-77
Sahai J, Gallicano K, Oliveras L, Khaliq S, Hawley-Foss N, Garber G "Cations in the didanosine tablet reduce ciprofloxacin bioavailability." Clin Pharmacol Ther 53 (1993): 292-7
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
"Product Information. Trovan (trovafloxacin)." Pfizer US Pharmaceuticals, New York, NY.
Polk RE "Drug-drug interactions with ciprofloxacin and other fluoroquinolones." Am J Med 87 (1989): s76-81
Damle BD, Mummaneni V, Kaul S, Knupp C "Lack of Effect of Simultaneously Administered Didanosine Encapsulated Enteric Bead Formulation (Videx EC) on Oral Absorption of Indinavir, Ketoconazole, or Ciprofloxacin." Antimicrob Agents Chemother 46 (2002): 385-91

Trovan

Generic Name: trovafloxacin

Brand name:

Synonyms: n.a.

What is Trovan?

Videx EC

Generic Name: didanosine

Brand name: Videx, Videx EC

Synonyms: n.a.

What is Videx EC?

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In the course of checking the drug compatibility and interactions, data from the following reference sources was used: Drugs.com, Rxlist.com, Webmd.com, Medscape.com.

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