Although not all of these side effects may occur, if they do occur they may need medical attention. Check with your doctor immediately if any of the following side effects occur while taking hydroxychloroquine: Incidence not known Some side effects of hydroxychloroquine may occur that usually do not need medical attention. Anti malaria medication plaquenil Hydroxychloroquine treats what conditions Chloroquine poisoning antidote Hydroxychloroquine HCQ, sold under the brand name Plaquenil among others, is a medication used for the prevention and treatment of certain types of malaria. Specifically it is used for chloroquine-sensitive malaria. Other uses include treatment of rheumatoid arthritis, lupus, and porphyria cutanea tarda. It is taken by mouth. PLAQUENIL is a synthetic Quinilone, belongs in the Floro Quinilone family which has a black box warning by the FDA. I did not this at the time i took it. Previously had bad tendon damage with Cipro. Hi everyone, I posted about this back in may. My rhuemy wanted me to up my dose of the plaquenil from 200 to 400 mg. I started at 300 mg, and by the 5th day I had such terrible anxiety and chest pain, i called the nurse and after arguing with her, the doctor said to try 300 mg every other day. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. These side effects may go away during treatment as your body adjusts to the medicine. Plaquenil vertigo Plaquenil and dizziness DailyStrength, PLAQUENIL Side Effects, Reviews by Patients - Hydroxychloroquine lung cancerChloroquine heme polymeraseHydroxychloroquine plaquenil 200 mg tabletDoes plaquenil help with osteoarthritis Meniere's disease is a disorder of the inner ear that can lead to dizzy spells vertigo and hearing loss. In most cases, Meniere's disease affects only one ear. Meniere's disease can occur at any age, but it usually starts between young and middle-aged adulthood. Meniere's disease - Symptoms and causes - Mayo Clinic. Plaquenil, anxiety and dizziness. Dont know what to do. Plaquenil Hydroxychloroquine - Side Effects, Dosage.. May 12, 2012 I just saw my rheumy yesterday, and she wants me to try to increase the plaquenil from 200mg to 400mg. I took 400mg today with lunch, and I noticed I got very dizzy shortly after taking the higher dose within an hour. It was almost like the dizziness I had when I was on percocet after surgery, could only lie down and couldn't think clearly. Find patient medical information for Plaquenil Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings. diarrhea, dizziness, or headache. The most common cause for vertigo is an inner ear infection- sometimes called viral labyrinthitis. Meclizine is a good drug to help with the symptoms. Since your symptoms are of new onset, it makes an inner ear infection more likely than a lupus related cause.