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. Hydroxychloroquine renal dosing Plaquenil prednisone Is plaquenil an immunosuppressant medication Some of the dosage forms listed on this page may not apply to the brand name Plaquenil. For the Consumer. Applies to hydroxychloroquine oral tablet. Along with its needed effects, hydroxychloroquine the active ingredient contained in Plaquenil may cause some unwanted effects. Although not all of these side effects may occur, if they do occur. Find patient medical information for Chloroquine Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings. Quinine and chloroquine poisoning are characterized by severe cardiovascular toxicity resulting from sodium and potassium channel blockade, leading to hypotension, shock, arrhythmias and cardiac arrest. Quinine poisoning can cause irreversible visual loss. Severity of symptoms is closely related to the ingested dose and plasma concentration. 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. Chloroquin toxicity Chloroquine - Wikipedia, Chloroquine Oral Uses, Side Effects, Interactions. Plaquenil oct maculaMalaria hydroxychloroquine resistanceHydroxychloroquine drugbank Chloroquine is the generic form of the brand-name prescription medicine Aralen, which is used to prevent and treat malaria — a mosquito-borne disease caused by a parasite — and to treat. Chloroquine Aralen - Side Effects, Dosage, Interactions.. Quinine and chloroquine - ScienceDirect. Side Effects of Plaquenil Hydroxychloroquine, Warnings, Uses. Retina Manifestations of Chloroquine and Hydroxychloroquine Toxicity. The classical definition of chloroquine toxicity is characterized by bilateral pigmentary change of the macula usually sparing the fovea. This has come to be known as bull’s-eye maculopathy. The retinal periphery may also be involved but infrequently. Chloroquine is a 4-aminoquinoline with antimalarial, anti-inflammatory, and potential chemosensitization and radiosensitization activities. Although the mechanism is not well understood, chloroquine is shown to inhibit the parasitic enzyme heme polymerase that converts the toxic heme into non-toxic hemazoin, thereby resulting in the accumulation of toxic heme within the parasite. Chloroquine phosphate tablets should not be used in these conditions unless the benefit to the patient outweighs the potential risks. Usage in Pregnancy Usage of Chloroquine during pregnancy should be avoided except in the prophylaxis or treatment of malaria when the benefit outweighs the potential risk to the fetus.