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. Chloroquine 250 mg dosage Chloroquine storage conditions Chloroquine and breastfeeding Common side effects include muscle problems, loss of appetite, diarrhea, and skin rash. Serious side effects include problems with vision, muscle damage, seizures, and low blood cell levels. It appears to be safe for use during pregnancy. Chloroquine is a member of the drug class 4-aminoquinoline. What are the possible side effects of chloroquine? Get emergency medical help if you have signs of an allergic reaction hives, difficult breathing, swelling in your face or throat or a severe skin reaction fever, sore throat, burning in your eyes, skin pain, red or purple skin rash that spreads and causes blistering and peeling. Additional information on side effects known to be associated with chloroquine can be found in the FDA-approved Full Prescribing Information for Chloroquine. 5. Because chloroquine is still being studied, information on possible side effects of the drug is not complete. As testing of chloroquine continues, additional information on possible. 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. Side effectsof chloroquine Chloroquine Phosphate Side Effects - GoodRx, Chloroquine Uses, Side Effects, Dosage & Interactions Hydroxychloroquine reviews sjogren's syndromeSide effects of chloroquine overdoseTreatment of hydroxychloroquine retinopathy Some side effects of chloroquine 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. Chloroquine Side Effects Common, Severe, Long Term.. Chloroquine Clinical Trials, Side Effects AIDSinfo. Hydroxychloroquine Side Effects Common, Severe, Long Term.. Oct 01, 2018 Since Chloroquine phosphate tablets are known to concentrate in the liver, it should be used with caution in patients with hepatic disease or alcoholism or in conjunction with known hepatotoxic drugs. Central Nervous System Effects Chloroquine may increase the risk of convulsions in patients with a history of epilepsy. Drug Interactions What Are Side Effects of Plaquenil? Common side effects of Plaquenil include. nausea, vomiting, stomach pain or cramps, loss of appetite, weight loss, diarrhea, dizziness, spinning sensation, headache, ringing in your ears, mood changes, nervousness, irritability, skin rash, itching, or; hair loss. Tell your doctor if you experience serious side effects of Plaquenil including. muscle weakness, twitching, Both adults and children should take one dose of chloroquine per week starting at least 1 week before traveling to the area where malaria transmission occurs. They should take one dose per week while there, and for 4 consecutive weeks after leaving. The weekly dosage for adults is 300mg base 500mg salt.