Hydroxychloroquine is available as the brand-name drug Plaquenil. Generic drugs usually cost less than the brand-name version. Hydroxychloroquine may be used as part of a combination therapy. Hydroxychloroquine sulfate and weight loss Sle lupus and plaquenil Hydroxychloroquine effect on platelets What is chloroquine 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. Side-effects aren't common. However, in some people hydroxychloroquine can cause skin rashes, especially those made worse by sunlight; feeling sick nausea or indigestion; diarrhoea; headaches; bleaching of the hair or mild hair loss; tinnitus ringing in the ears visual problems. Side effects. In some people, HCQ may cause gastrointestinal problems, such as nausea, vomiting, upset stomach, cramps, or diarrhea. These may occur for the first few days a person takes the drug while the body adjusts to the medication. Loss of appetite, tiredness, weakness, or headache are uncommon side effects and typically go away over time. Hydroxychloroquine is used to treat lupus erythematosus and rheumatoid arthritis. It isn’t fully understood how this drug works to treat lupus erythematosus or rheumatoid arthritis. That means you may need to take it with other drugs. It treats malaria by killing the parasites that cause the disease. What are the side effects of hydroxychloroquine 200 mg Hydroxychloroquine Side Effects, Dosage, Uses, and More, Hydroxychloroquine Side-effects, uses, time to work Toxicity of hydroxychloroquineCost of chloroquine malaria tabletsHydroxychloroquine and allergy testingPatients assistance for hydroxychloroquine For the Consumer. Continuing ringing or buzzing or other unexplained noise in the ears. feeling of constant movement of self or surroundings. irritability. nausea. nervousness. nightmares. sensation of spinning. shakiness and unsteady walk. uncontrolled eye movements. unsteadiness, trembling, or. Hydroxychloroquine Side Effects Common, Severe, Long Term.. Drug spotlight on hydroxychloroquine Lupus Foundation of.. Evaluations from Patients who take Hydroxychloroquine.. Does Hydroxychloroquine Have Side Effects? Like all medications, there is the risk of side effects. Fortunately, the problems seen by people taking this medication are usually very mild. Serious side effects are rare. Overall, most people who have any noticeable side effects from hydroxychloroquine experience diarrhea or nausea. Some side effects 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. Hydroxychloroquine is an anti-malaria medicine. It is also sometimes used to treat rheumatoid arthritis RA and systemic lupus erythematosus lupus. Common side effects include headache; nausea; diarrhea; dizziness; vomiting; stomachache; skin rash or darkening of the skin; weakness; hair loss; This is not a complete list.