Although hair loss is not listed as a side effect in the product information for Benlysta, at least 3 people have reported hair loss as a side effect since the drug has been approved. The type of hair loss reported in these 3 people taking Benlysta was alopecia areata, symptoms include patchy hair loss on the scalp or other areas of the body, which is an autoimmune condition (like lupus). All 3 cases resolved but 2 out of 3 people stopped taking Benlysta.