“ The mechanism of action of hydroxychloroquine involves inhibiting the function of lysosomes within cells, thereby interfering with processes essential for antigen presentation and cytokine production. hcqplaquenil.com hydroxychloroquine cost By modulating the immune response, hydroxychloroquine helps to suppress inflammation and autoimmune activity, leading to symptomatic relief and disease stabilization in conditions such as rheumatoid arthritis and lupus erythematosus. ”