It does not work against certain types of malaria (chloroquine-resistant). The United States Center for Disease Control provides updated guidelines and travel recommendations for the prevention and treatment of malaria in different parts of the world. How does plaquenil work in the body Chloroquine brain cancer Chloroquine chemotherapy Metronidazole oral tablet can interact with other medications, vitamins, or herbs you may be taking. An interaction is when a substance changes the way a drug works. This can be harmful or prevent. Metronidazole Major Avoid coadministration of hydroxychloroquine and metronidazole. Hydroxychloroquine increases the QT interval and should not be administered with other drugs known to prolong the QT interval. Ventricular arrhythmias and torsade de pointes have been reported with the use of hydroxychloroquine. Summary Drug interactions are reported among people who take Plaquenil and Metronidazole together. This study is created by eHealthMe based on reports of 252 people who take Plaquenil and Metronidazole from Food and Drug Administration FDA, and is updated regularly. This medication is also used, usually with other medications, to treat certain auto-immune diseases (lupus, rheumatoid arthritis) when other medications have not worked or cannot be used. Discuss the most recent information with your doctor before traveling to areas where malaria occurs. Metronidazole with plaquenil interaction Interactions between Lexapro Oral and qt-prolonging-agents., Plaquenil hydroxychloroquine sulfate dose, indications. What are chloroquine phosphate tablets used forOct plaquenilPlaquenil toxicityEye doctors for plaquenil screeningAreas with chloroquine or mefloquine resistance How to use Plaquenil. Hydroxychloroquine is usually taken with food or milk to prevent stomach upset. The dosage and length of treatment are based on your medical condition and response to therapy. In children, dosage is also based on weight. Plaquenil Oral Uses, Side Effects, Interactions, Pictures.. Plaquenil and Metronidazole drug interactions - eHealthMe. Metronidazole Flagyl - Side Effects, Dosage.. Drug Interactions. Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. Metronidazole is predicted to increase the risk of capecitabine toxicity when given with capecitabine. Manufacturer makes no recommendation. Severity of interaction Hydroxychloroquine Major Avoid coadministration of hydroxychloroquine and metronidazole. Hydroxychloroquine increases the QT interval and should not be administered with other drugs known to prolong the QT interval. Ventricular arrhythmias and torsade de pointes have been reported with the use of hydroxychloroquine.