Drug General Information (ID: DDIQF07CVT)
Drug Name			Grepafloxacin		Drug Info		Methyl aminolevulinate (topical)		Drug Info
Drug Type		Small molecule				Small molecule
Therapeutic Class		Antibiotics				Antineoplastics
Structure

Mechanism of Grepafloxacin-Methyl aminolevulinate (topical) Interaction (Severity Level: Moderate)
Increased risk of photosensitivity reactions Click to Show/Hide Mechanism Graph
Drug Name		Grepafloxacin				Methyl aminolevulinate (topical)
Mechanism		Photosensitivity reactions				Photosensitivity reactions
Key Mechanism Factor 1
		Factor Name		Photosensitivity reactions
		Factor Description		Drug-induced photosensitivity reactions occur when certain photosensitizing drugs cause unexpected sunburn or dermatitis (dry, bumpy or blistering rash) on sun-exposed skin (face, neck, arms, backs of hands, and often lower legs and feet). The rash may or may not be itchy.
Mechanism Description		Increased risk of photosensitivity reactions by the combination of Grepafloxacin and Methyl aminolevulinate (topical)

Recommended Action
Management		Caution is advised and pharmacologic response to photodynamic therapy should be carefully monitored if concomitant use of other photosensitizing agents cannot be avoided. Patients should be advised to avoid exposure of treated areas to sunlight or bright indoor lights (e.g., examination lamps, operating room lamps, tanning beds, lights at close proximity) during the period between application of aminolevulinic acid or methyl aminolevulinate and photoactivation, and for 48 hours post-illumination. Concomitant use with other topical medicinal products should be avoided.

References
1	Cerner Multum, Inc. "Australian Product Information.".
2	Cerner Multum, Inc. "UK Summary of Product Characteristics.".
3	Product Information. Metvixia (methyl aminolevulinate topical). Galderma Laboratories Inc, Cranbury, NJ.