Question: what is the difference between plaquenil and hydroxychloroquine?
Answer: Chloroquine is not effective for malaria prevention. Chloroquine is used off-label to treat porphyria cutanea tarda. Hydroxychloroquine (Plaquenil) is an anti-malarial drug used to treat several forms of malaria as well as lupus erythematosus and rheumatoid arthritis.