After every side effect possible, I finally stopped taking 200mgs of Plaquenil after dinner every day. Now four days later I am still so nauseated I can barely function and I am also still getting horrible headaches and cramps. Has anyone else had this experience and when does it stop? I contacted my doctor a week ago by leaving a phone message and a wrote a medication query on the patient portal, but have received no answer as of yet. Thank you.