A daily dose of aspirin is often prescribed after a diagnosis of heart attack or cardiovascular disease. But new research shows that the anti-inflammatory medication is also associated with a lower risk of melanoma in postmenopausal women. Melanoma is the most deadly form of skin cancer, killing more than 9,000 people a year in the United States. The study, published online March 11, 2013, in the journal Cancer, found that white women ages 50 to 79 who took aspirin had a 20% to 30% lower risk of developing melanoma than women who didn't take aspirin. The study didn't determine the dosage and frequency required to lower the risk of developing melanoma, but most women took either an 81-mg dose or a 325-mg dose at least twice a week. Because the study was not a randomized trial, it could not prove that the use of aspirin lowered the risk of developing melanoma.