Drug Interaction Report
1 potential interaction and/or warning found for the following 2 drugs:
- Azithromycin Dose Pack (azithromycin)
- grepafloxacin
Interactions between your drugs
azithromycin grepafloxacin
Applies to: Azithromycin Dose Pack (azithromycin), grepafloxacin
CONTRAINDICATED: Grepafloxacin can cause dose-related prolongation of the QT interval. 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.
MANAGEMENT: Coadministration of grepafloxacin with other drugs that can prolong the QT interval is considered contraindicated.
References (7)
- Thomas M, Maconochie JG, Fletcher E (1996) "The dilemma of the prolonged QT interval in early drug studies." Br J Clin Pharmacol, 41, p. 77-81
- (2001) "Product Information. Raxar (grepafloxacin)." Glaxo Wellcome
- Lode H, Vogel F, Elies W (1999) "Grepafloxacin: A review of its safety profile based on clinical trials and postmarketing surveillance." Clin Ther, 21, p. 61-74
- Ball P (2000) "Quinolone-induced QT interval prolongation: a not-so-unexpected class effect." J Antimicrob Chemother, 45, p. 557-9
- Cerner Multum, Inc. "UK Summary of Product Characteristics."
- Canadian Pharmacists Association (2006) e-CPS. http://www.pharmacists.ca/function/Subscriptions/ecps.cfm?link=eCPS_quikLink
- Cerner Multum, Inc. "Australian Product Information."
Drug and food interactions
No alcohol/food interactions were found with the drugs in your list. However, this does not necessarily mean no food interactions exist. Always consult your healthcare provider.
Therapeutic duplication warnings
No duplication 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
| Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit. | |
| Moderately clinically significant. Usually avoid combinations; use it only under special circumstances. | |
| 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. | |
| No interaction information available. |
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