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 safety g6pd Hydroxychloroquine and sulfasalazine combination 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. Potential QT prolongation has been reported in limited case reports with metronidazole. Does Plaquenil Interact with other Medications? Severe Interactions. These medications are not usually taken together. Consult your healthcare professional e.g. doctor or pharmacist for more in. Sep 13, 2019 Applies to hydroxychloroquine oral tablet. Along with its needed effects, hydroxychloroquine may cause some unwanted effects. 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 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. Plaquenil and valium The Only Two Ways to Raise Brain Serotonin Levels., Plaquenil Oral Interactions with Other Medication When is plaquenil usedPlaquenil leaky gutHydroxychloroquine causing neuropathyAutofluorescence plaquenil toxicityHydroxychloroquine overdose toxicokinetics and management Medscape - Indication-specific dosing for Plaquenil hydroxychloroquine sulfate, frequency-based adverse effects, comprehensive interactions, contraindications, pregnancy & lactation schedules, and cost information. Plaquenil hydroxychloroquine sulfate dosing, indications.. Hydroxychloroquine Side Effects Common, Severe, Long Term.. Plaquenil can cause back and leg pain? What type?. Updated May 2019. Drug interactions may take place if CBD is taken at the same time as another course or dose of medication. CBD can affect how our bodies process other drugs, which may impact how much of the medication ends up in our system as well as alter its reaction in the body, potentially causing negative side effects. Hydroxychloroquine sulfate is a colorless crystalline solid, soluble in water to at least 20 percent; chemically the drug is 2-4-7-Chloro-4-quinolylaminopentylethylamino ethanol sulfate 11. PLAQUENIL hydroxychloroquine sulfate tablets contain 200 mg hydroxychloroquine sulfate, equivalent to 155 mg base, and are for oral administration. 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.