Malaria is common in areas such as Africa, South America, and Southern Asia. This medicine is not effective against all strains of malaria. Oct findings with plaquenil toxicity How soon does plaquenil start working Hydroxychloroquine may cause some people to be agitated, irritable, or display other abnormal behaviors. It may also cause some people to have suicidal thoughts and tendencies, or to become more depressed. If you or your caregiver notice any of these side effects, tell your doctor right away. Hydroxychloroquine may not prevent malaria in all cases. If you experience fever or other symptoms of illness, seek immediate medical attention. You may need a different medication. Hydroxychloroquine is a prescription drug. It comes as an oral tablet. Hydroxychloroquine is available as the brand-name drug Plaquenil. It’s also available in a generic version. Hydroxychloroquine may also be used for purposes not listed in this medication guide. Hydroxychloroquine is also used to treat symptoms of rheumatoid arthritis and discoid or systemic lupus erythematosus. Does hydroxychloroquine require a prescription Hydroxychloroquine Medicare Coverage and Co-Pay Details., Hydroxychloroquine Oral Uses, Side Effects, Interactions. Plaquenil and visionDose of hydroxychloroquinePlaquenil 40 mg Does Hydroxychloroquine SULFATE Interact with other Medications? Severe Interactions. These medications are not usually taken together. Consult your healthcare professional e.g. doctor or. Hydroxychloroquine Oral Interactions with Other Medication. Hydroxychloroquine Side Effects, Dosage, Uses, and More. Hydroxychloroquine - Side Effects, Dosage, Interactions.. This product requires a valid prescription for shipment, please note that may not accept prescriptions faxed or emailed by patients. PRESCRIPTION REQUIRED; IMPORTANT HOW TO USE THIS INFORMATION This is a summary and does NOT have all possible information about this product. This information does not assure that this. Take this medicine by mouth with a glass of water. Follow the directions on the prescription label. Avoid taking antacids within 4 hours of taking this medicine. It is best to separate these medicines by at least 4 hours. Do not cut, crush or chew this medicine. You can take it with or without food. If it upsets your stomach, take it with food. Hydroxychloroquine is not approved for use by anyone younger than 18 years old. How should I take hydroxychloroquine? Take hydroxychloroquine exactly as prescribed by your doctor. Follow all directions on your prescription label. Do not take this medicine in larger or smaller amounts or for longer than recommended.