Malaria is common in areas such as Africa, South America, and Southern Asia. This medicine is not effective against all strains of malaria. Maximum dose of plaquenil History of hydroxychloroquine Hydroxychloroquine comes as a tablet to take by mouth. For prevention of malaria in adults, two tablets are usually taken once a week on exactly the same day of each week. The first dose is taken 1 to 2 weeks before traveling to an area where malaria is common, and then doses are continued for 8 weeks after exposure. Discontinuation of hydroxychloroquine could decrease hydrocodone plasma concentrations, decrease opioid efficacy, and potentially lead to a withdrawal syndrome in those with physical dependence to hydrocodone. If hydroxychloroquine is discontinued, monitor the patient carefully and consider increasing the opioid dosage if appropriate. If you are allergic to hydroxychloroquine; any part of hydroxychloroquine; or any other drugs, foods, or substances. Tell your doctor about the allergy and what signs you had. If you have had any eye changes or changes in eyesight due to hydroxychloroquine or drugs like this one. If you have psoriasis. If you have porphyria. Taking hydroxychloroquine long-term or at high doses may cause irreversible damage to the retina of your eye. Hydroxychloroquine is also an antirheumatic medicine and is used to treat symptoms of rheumatoid arthritis and discoid or systemic lupus erythematosus. Hydroxychloroquine sulfate monitor HYDROXYCHLOROQUINE SULFATE Drug BNF content published by NICE, Plaquenil hydroxychloroquine sulfate dose, indications. Does plaquenil reduce pain in osteoarthritisG6pd plaquenilWhat should you test for with hydroxychloroquineHydroxychloroquine and epsom salt bathChloroquine in treatment of hypercalcemia Monitoring and Preventing Hydroxychloroquine, Plaquenil, Toxicity. The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U. S. Federal Government. Monitoring and Preventing Hydroxychloroquine, Plaquenil, Toxicity.. Hydroxychloroquine Indications, Side Effects, Warnings.. Hydroxychloroquine Sulfate - Local Health RX. Giving Hydroxychloroquine SULFATE to a child under 12. Severe Precaution Monitor for toxic effects. Infants and children have increased sensitivity. directions, precautions, drug interactions. Hydroxychloroquine sulfate tablets are indicated for the treatment of uncomplicated malaria due to P. falciparum, P. malariae, P. ovale, and P. vivax. Hydroxychloroquine sulfate tablets are indicated for the prophylaxis of malaria in geographic areas where chloroquine resistance is not reported. Limitations of Use in Malaria Find patient medical information for Plaquenil Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings.