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 retinopathy info for patient Arthritis medicine plaquenil Sulfasalazine and hydroxychloroquine Aralen chloroquine is an antimalarial drug used for the treatment of malaria and extraintestinal amebiasis. Common side effects are reduced hearing, tinnitus, nausea, vomiting, and diarrhea. Dosage, drug interactions, and pregnancy and breastfeeding safety are provided. Side Effects Nausea, stomach cramps, loss of appetite, diarrhea, dizziness, or headache may occur. If any of these effects persist or worsen, notify your doctor or pharmacist promptly. Remember. For all uses of chloroquine Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered. Signs of liver problems like dark urine, feeling tired, not hungry, upset stomach or stomach pain. Signs of low blood sugar like dizziness, headache, feeling sleepy, feeling weak. 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. Chloroquine headache Side Effects of Plaquenil Hydroxychloroquine, Warnings, Uses, Plaquenil Oral Uses, Side Effects, Interactions, Pictures. Plaquenil vs genericChloroquine directions for use In usual doses for treatment of malaria, headache, blurred vision, and lichenoid rash can occur. Chloroquine may block the entrance of potassium into the cells and primaquine also has an effect on blocking sodium channels. Side Effects of Chloroquine and Primaquine and Symptom.. Chloroquine Indications, Side Effects, Warnings -. Chloroquine Aralen - Side Effects, Dosage, Interactions.. Plaquenil is the brand name for the prescription drug hydroxychloroquine. It's used to treat and prevent malaria infection, and to reduce symptoms and progression of autoimmune diseases such as lupus, rheumatoid arthritis, and others. Malaria is spread by mosquitoes. Chloroquine toxicity and Headache and Itching skin 3 causes Chloroquine toxicity and Headache and Nausea 3 causes Chloroquine toxicity and Headache and Seizures 3 causes Chloroquine toxicity and Headache and Cardiovascular symptoms 2 causes Chloroquine toxicity and Headache and Low blood pressure 2 causes Chloroquine toxicity and. May 07, 2012 Plaquenil is used in the treatment of sarcoidosis but its main use is in the treatment of malaria. One of the side effects of taking the drug is that it affects eye sight, and eye tests, especially field of vision tests need to be done every six months. For the four years that I took the drug.