This study is testing a new medicine called **galvokimig** for adults with *atopic dermatitis* (AtD), which is a severe kind of eczema that causes itchy and inflamed skin. The study is looking at how different doses of galvokimig work compared to a *placebo* (a fake treatment with no medicine) to see if it helps symptoms and is safe to use. People can join if they're 18 or older, have had AtD for at least a year, and have not responded well to other treatments. **Key Points:** - Participants will need to stop other AtD treatments before starting the study. - The study will involve taking the study medicine and possibly placebo. - **Eligibility**: Some health conditions or past treatments may disqualify participants. This study could help find better treatments for people with moderate-to-severe AtD, but there are risks involved, such as side effects or worsening symptoms. It's important to talk with your doctor to see if this study is a good fit for you.