I have been on plaquenil  to treat Lupus for 3 and 1/2 months and the joint pain has come under control for the most part. I had a flare of joint pain last week when the weather changed but yesterday a new and frustrating symptom has occured. I have been having dizzy spells that make me feel like I am going to fall over and stomach pain/nausea. Has anyone delt with this symptom?