Medicine information
Uses & overview
Hydroxychloroquine 400 mg is a prescription medicine used for certain medical conditions, including selected forms of malaria, rheumatoid arthritis, and systemic lupus erythematosus. It belongs to the antimalarial drug group and is also classified as a disease-modifying antirheumatic medicine because it can help control inflammation and disease activity in some autoimmune disorders. Hydroxychloroquine works against susceptible malaria parasites and modifies immune-system activity in autoimmune conditions. In patients with rheumatoid arthritis or lupus, it may help reduce joint pain, stiffness, and other inflammatory symptoms. Its suitability depends on the specific diagnosis, individual response, and medical supervision. Not all types of malaria respond to hydroxychloroquine, so treatment selection must account for local parasite resistance. Hydroxychloroquine requires careful monitoring because it can cause serious adverse effects, including heart rhythm disturbances and retinal damage, particularly with prolonged use or increased exposure. Your doctor may recommend eye examinations and other assessments depending on your dose, duration of treatment, and medical history.
How to use
Use only with a prescription: Take Hydroxychloroquine 400 mg only under the supervision of a qualified healthcare professional. Follow the prescribed dose: The appropriate dosage depends on the condition being treated, body weight, medical history, and treatment plan. Take with food: Taking the tablet with a meal or glass of milk may help reduce stomach discomfort. Follow the product instructions. Swallow with water: Take the tablet as directed by your doctor or pharmacist. Maintain a regular schedule: Take each dose at the recommended time and do not double a dose if you miss one. Follow the treatment plan: Malaria treatment and long-term autoimmune treatment use different dosing schedules. Never apply one regimen to another condition. Attend eye examinations: Long-term use may require retinal screening to identify potential eye toxicity early. Review other medicines: Tell your doctor about heart medicines, antacids, diabetes medicines, and all other prescription or nonprescription products you use. Monitor adverse effects: Seek prompt medical attention for vision changes, fainting, palpitations, severe muscle weakness, or signs of an allergic reaction. Store safely: Keep the tablets in their original packaging and away from children.
Storage
Store in cool and dry place
