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.
I had side effects for about 2 week when first taking Plaquenil. I got headaches, sneezing, runny nose etc for about 1/2 hour each time I took it but persevered and so glad I did. 8 years on I am on a maintenance dose of 200mg with no side effects whatsoever. few weeks after I stopped Plaquenil, I met two people who had Lupus and had been on Plaquenil. They both stopped the drug because of side effects that included anxiety, extreme irritability, being very emotional. One of these people also had pressure build up behind her eyes which her doctor attributed to Plaquenil.