Efficacy of azithromycin in the treatment of cyclosporine-induced gingival hyperplasia in renal transplant recipients.
BACKGROUND
Gingival hyperplasia (GH) is a common side effect of cyclosporine . Azithromycin (Zithromax; AZI) is a macrolide antibiotic reported in case studies to reduce cyclosporine-induced gingival hyperplasia (CIGH) in renal transplant recipients (RTR).


METHODS
The efficacy of AZI to treat CIGH in RTR was examined in a double-blind, randomized crossover trial. Patients (n=17) with CIGH were randomized to receive AZI and a matching placebo in alternate order for 5 days, separated by a 2-week washout period. Follow-up visits were conducted at week 6 and week 12. Changes in GH were evaluated by measuring the clinical gingival sulcus depths, tooth length, and the length of the interdental papillae to the cementum-enamel junction of two teeth in each of the four quadrants.


RESULTS
Significant improvements were observed in all three types of periodontal measurements, representing reductions of gingival tissue above the medial aspect of the tooth, of the gingival sulcus depth, and of the length of the interdental papillae. Patients reported an improvement in gum bleeding. AZI was well tolerated, and 67% of the patients reported that the treatment was at least somewhat useful.


CONCLUSIONS
AZI should be considered for RTR with CIGH.
Department of Medicine, St. Michael's Hospital, University of Toronto, Ontario, Canada.
M M
MM
Nash
J S
JS
Zaltzman
D000328:Adult; D000900:Anti-Bacterial Agents / Q000627:therapeutic use*; D017963:Azithromycin / Q000627:therapeutic use*; D016572:Cyclosporine / Q000009:adverse effects*; D004311:Double-Blind Method; D005260:Female; D005885:Gingival Hyperplasia / Q000188:drug therapy*; D006801:Humans; D007166:Immunosuppressive Agents / Q000009:adverse effects*; D016030:Kidney Transplantation / Q000009:adverse effects*; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies
D000900:Anti-Bacterial Agents; D007166:Immunosuppressive Agents; D017963:Azithromycin; D016572:Cyclosporine