Reviewing Lab Results in a Patient with Chronic Severe Atopic Dermatitis

An 18 year old boy has chronic severe atopic dermatitis that is not well controlled on aggressive topical skin care. He was started on dupilumab and had some improvement over the first 3 months. However, at 6 month follow up, he reports that he continues to use high potency topical steroids almost daily, and he continues to have several poor nights of sleep per week. He returns after an initially reassuring baseline lab report, a reassuring one month report, and is now ready to discuss the lab results from the 3 month point. Overall, he is doing much better, and the ADCT score is 5 today, notably suggesting control (<7 is considered under control). However, the lab results demonstrate elevated serum levels of creatine phosphokinase (CPK). What would be the next best step for this patient?