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. Plaquenil lymphoma Chloroquine tablet for malaria Hydroxychloroquine cautions Chloroquine description The more common side effects that can occur with hydroxychloroquine include headache. dizziness. diarrhea. stomach cramps. vomiting. Sep 13, 2019 Check with your doctor immediately if any of the following side effects occur while taking hydroxychloroquine Incidence not known Blistering, peeling, loosening of the skin 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 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. What is hydroxychloroquine side effects Plaquenil Side Effects on Your Eyes and Vision, Plaquenil Side Effects Common, Severe, Long Term - Chloroquine endosomal acidification inhibitorPlaquenil medication insertPlaquenil and iplPlaquenil sjogren's fatigue Feb 19, 2020 What Are Side Effects of Plaquenil? nausea, vomiting, stomach pain or cramps, loss of appetite, weight loss, diarrhea, dizziness, spinning sensation, headache, ringing in your ears, Side Effects of Plaquenil Hydroxychloroquine, Warnings, Uses. Hydroxychloroquine Side-effects, uses, time to work. Hydroxychloroquine Oral Route Precautions - Mayo Clinic. Serious Side Effects of Plaquenil. Any vision problems, such as reading difficulties, sensitivity to light, seeing light flashes or streaks, blurred distance vision, or other issues. Hearing problems, such as ringing or ticking in the ears, or hearing changes Plaquenil may have toxic effects on. Hydroxychloroquine side effects. nausea. irritability. sensation of spinning. shaking or unsteadiness. unsteady walk. vomiting. diarrhea. nervousness. buzzing or ringing in the ears. Get medical help right away if you have any very serious side effects, including sensitivity to light, vision changes e.g. blurred vision, seeing light flashes/streaks/halos, missing/blacked-out areas of vision, muscle weakness, numbness/tingling/pain of the arms/legs.