Malaria is common in areas such as Africa, South America, and Southern Asia. This medicine is not effective against all strains of malaria. Plaquenil sudden neck stiff neck pain Sulfasalazine taken with hydroxychloroquine Side effects Mild nausea, constipation, headaches, dizziness, tinnitus Some side effects of hydroxychloroquine may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Nov 09, 2018 Common side effects may include headache, dizziness, ringing in your ears; nausea, vomiting, stomach pain; loss of appetite, weight loss; mood changes, feeling nervous or irritable; skin rash or itching; or. hair loss. Hydroxychloroquine may also be used for purposes not listed in this medication guide. Hydroxychloroquine is also used to treat symptoms of rheumatoid arthritis and discoid or systemic lupus erythematosus. Side effects of hydroxychloroquine 400 mg Side Effects of Plaquenil Hydroxychloroquine, Warnings, Uses, Hydroxychloroquine Side Effects Common, Severe, Long Term - Plaquenil toxictyChloroquine and prostate cancerHydroxychloroquine nursing considerationsChloroquine and osmotic lysis of endosomeNovo-chloroquine 250 mg side effects Side effects include irritability, headache, weakness, hair lightening or loss, stomach upset, nausea, dizziness, muscle pain, rash and itching. Rarely, hydroxychloroquine can affect the bone marrow leading to reduced white blood cells leukopenia or platelets thrombocytopenia. Hydroxychloroquine Plaquenil Side Effects & Dosage for.. Hydroxychloroquine - Side Effects, Dosage, Interactions.. Hydroxychloroquine Plaquenil. Severe side effects of hydroxychloroquine may include 1, 2, 4 retinopathy. visual impairment. cardiomyopathy. thoughts of suicide. hearing loss. heart failure. pulmonary hypertension. ventricular fibrillation. Consult a doctor for medical advice about side effects. To report hydroxychloroquine side effects to the FDA, visit gov/medwatch. Hydroxychloroquine received an overall rating of 7 out of 10 stars from 368 reviews. See what others have said about Hydroxychloroquine, including the effectiveness, ease of use and side effects. Hydroxychloroquine Side Effects. Get emergency medical help if you have signs of an allergic reaction. Hydroxychloroquine 200 mg-TEV, white, oblong. Hydroxychloroquine 200 mg-WAT, white, oval.