Managing rosacea: a review of the use of metronidazole alone and in combination with oral antibiotics.
BACKGROUND
Rosacea is an extremely common chronic dermatosis affecting an estimated 14 million Americans. Rosacea is most commonly managed with topical metronidazole, sometimes in combination with oral antibiotics.


OBJECTIVE
To review published studies about topical metronidazole therapy for rosacea, both as a monotherapy and in conjunction with oral antibiotics.


METHODS
Medline searches were conducted for clinical trials using metronidazole, tetracycline, and doxycycline for rosacea.


RESULTS
Topical metronidazole has been well studied as a rosacea therapy. Twice-daily dosing of metronidazole 1.0% cream is as effective as 250 mg tetracycline twice daily. Metronidazole 1.0% gel used once daily is as effective as azelaic acid 15% gel dosed twice daily. When dosed at subantimicrobial levels, doxycycline 20 mg taken twice daily is effective in decreasing inflammatory lesions and erythema associated with rosacea. Metronidazole 0.75% lotion is more effective when used in combination with doxycycline 20 mg dosed twice daily.


CONCLUSIONS
Metronidazole in 0.75% strength lotion, cream, and gel and 1.0% metronidazole cream and gel are all efficacious in treating rosacea. Combination treatment with oral antibiotics at both antimicrobial and subantimicrobial doses is an efficacious means of treating rosacea. Maintenance treatment with topical metronidazole decreases relapses and allows for longer intervals between flares.
Conde
Jennifer F
JF
Center for Dermatology Research, Department of Dermatology, Wake Forest University School of Medicine, Winston-Salem, NC 27157-1071, USA.
Yelverton
Christopher B
CB
Balkrishnan
Rajesh
R
Fleischer
Alan B
AB
Feldman
Steven R
SR
D000900:Anti-Bacterial Agents / Q000008:administration & dosage*; D002986:Clinical Trials as Topic; D003879:Dermatologic Agents / Q000008:administration & dosage*; D003998:Dicarboxylic Acids / Q000008:administration & dosage; D004318:Doxycycline / Q000008:administration & dosage; D004333:Drug Administration Routes; D004334:Drug Administration Schedule; D004359:Drug Therapy, Combination; D006801:Humans; D008795:Metronidazole / Q000008:administration & dosage*; D012393:Rosacea / Q000188:drug therapy*; D013752:Tetracycline / Q000008:administration & dosage
D000900:Anti-Bacterial Agents; D003879:Dermatologic Agents; D003998:Dicarboxylic Acids; D008795:Metronidazole; C010038:azelaic acid; D013752:Tetracycline; D004318:Doxycycline