(Reuters) -Only about one-third of patients prescribed a popular weight-loss drug like Novo Nordisk’s Wegovy were still taking it a year later, while total healthcare costs for the group rose sharply, according to an analysis of U.S. pharmacy claims shared with Reuters. The annual cost of overall care for patients prior to taking Wegovy or a similar drug was $12,371, on average, according to the analysis. Medicines such as Wegovy can cost more than $1,000 per month, and any improvement in health and subsequent reduction in medical costs is not likely to occur quickly.