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.
Abdominal cramps. Cramps in the abdomen are often accompanied by diarrhea or nausea. Plaquenil can cause both of these side effects, so stomach cramps are also a common side effect. Cramps are usually not serious, but if cramps persist or intensify, seek medical care as soon as possible. Allergic reaction.