Listeriosis is a disease caused by infection with a gram-positive, rod-shaped bacterium called Listeria monocytogenes. Listeria monocytogenes is ubiquitous, and it is usually found in soil, water, and decaying vegetation.
Common side effects of Plaquenil include. 1  nausea, 2  vomiting, 3  stomach pain or cramps,  loss of 1  appetite, weight loss, 2  diarrhea, dizziness,  spinning 1  sensation, headache,  ringing in 1  your ears, mood  changes, 1  nervousness, irritability,  skin rash, 1  itching,  or. hair loss.
1 Although vision problems and loss of sight while taking hydroxychloroquine (Plaquenil) for the treatment of lupus or arthritis are very rare, notify your doctor if you notice any changes in your vision.2  Your doctor also may suggest regular eye exams while taking this medication.ydroxychloroquine (Plaquenil) is considered a disease-modifying anti-rheumatic drug (DMARD), because it can decrease the pain and swelling of arthritis, and it may prevent joint damage and reduce the risk of long-term disability.