Capsular contracture is a distressing complication after breast augmentation for both the patient and surgeon. Although capsular contracture is a multifactorial process, one common denominator in the successful treatment of this complication is believed to be the abatement of inflammation. Leukotriene antagonists have recently emerged as effective prophylactic agents in reactive airway diseases. A prospective study was carried out on 60 female patients (120 prostheses implanted) with mild/severe capsular contracture in at least one breast. The hardness of capsular contracture was assessed by means of the mammary compliance method. Patients received zafirlukast (AccolateTM) for a 6-month period. Mammary compliance was assessed at the start of the study and thereafter monthly, during drug intake and for one year after drug withdrawal. The results show a significant decrease in breast compliance values in the first 6 months, followed by a significant increase one year after the end of drug intake. Indeed, zafirlukast-treated patients displayed a 6.93% reduction in mammary compliance after 1 month, 14.42% after 3 months, 22.05% after 6 months and 22.52% after 7 months (1 month after the withdrawal of the drug). Thereafter, mammary compliance values gradually increased. A 5.47% reduction in mammary compliance was observed 1 year after drug withdrawal. The present study suggests that zafirlukast may be effective in reducing breast capsule distortion in patients with long-standing contracture, though reduced capsular contracture values are strictly related to the duration of drug intake. Capsular contracture is the most common problem and cause of patient dissatisfaction following augmentation mammaplasty and mammary reconstruction with breast implants; the reported rates of this complication range from 0.5 to 59% (1).Every patient who undergoes implantation with an alloplastic implant experiences capsules around the prostheses. Fibrotic tissue promotes compression around the implant, which in tum distorts and deforms the mass, compromising the aesthetic result and causing pain (2-7). Breast firmness that is so marked as to result in a painful, hard breast, on occasion with visible distortion, has been termed fibrous capsular contracture (8). A number of intraoperative and postoperative factors may be linked to capsular contracture. Unfortunately, as few strictly-controlled studies have been conducted to investigate the causes and possible prevention of capsular contracture, there are as yet no definite data on the aetiopathogenesis of this complication (8). Although the pathogenesis of capsular contractere is still unclear, most reports indicate a multifactor explanation (2-6).The development of a fibrotic capsule around